Space policy roundup – June.30.2019

A sampling of links to recent space policy, politics, and government (US and international) related space news and resource items that I found of interest:

Webcasts:

**  The Space Show – Sun, 06/23/2019Loren Grush, space reporter at The Verge, discussed “the upcoming Falcon Heavy STP 2 launch, commercial, getting to and from the Moon, millennials and space, China, aerospace engineering, space journalism, women in space fields, green propellant and so very much more”.

** The Space Show/Hotel Mars – Wed, 06/26/2019 – Alan Boyle talked with John Batchelor and Dr. David Livingston about “the possible sale of Stratolaunch due to the recent death of Paul Allen”.

** The Space Show – Fri, 06/28/2019Charles Fishman talked about his new book, One Giant Leap: The Impossible Mission That Flew Us to the Moon.

** Hera: ESA’s planetary defence mission – ESA

** June 25, 2019 Zimmerman/Batchelor podcast | Behind The Black

** June 27, 2019 Zimmerman/Batchelor podcast | Behind The Black

 

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The Case for Space:
How the Revolution in Spaceflight Opens Up
a Future of Limitless Possibility

Space transport roundup – June.28.2019

A sampling of recent articles, videos, and images dealing with space transport:

[ Update: SpaceX accelerates Super Heavy/Starship development : SpaceX targets 2021 commercial Starship launch – SpaceNews.com.

More SpaceX items below.

]

** Rocket Lab aims to launch an Electron rocket on June 29th following two postponements.

Live streaming webcast will begin 20 minutes before the targeted lift-off time. Here is some background on the “Make it Rain” mission:

The Make It Rain mission will launch multiple spacecraft as part of a rideshare flight procured by Spaceflight. The launch will take place from Rocket Lab Launch Complex 1 on New Zealand’s Māhia Peninsula.

The mission is named ‘Make it Rain’ in a nod to the high volume of rainfall in Seattle, where Spaceflight is headquartered, as well in New Zealand where Launch Complex 1 is located. Among the payloads on the mission for Spaceflight are BlackSky’s Global-3 satellite and Melbourne Space Program’s ACRUX-1 CubeSat.

More about the mission:

** Space is the theme of the July/August 2019 issue of MIT Technology Review magazine and several of the articles deal with space transport related topics, e.g.

** An interesting interview with Tom Markusic, founder and CEO of Firefly Aerospace, who talks about his experiences in working at NASA, SpaceX, Blue Origin, and Virgin Galactic: Talking With a Leader of the Next Generation of Rocketry Companies – Texas Monthly

TM: I recently saw a stat that said SpaceX built its Falcon 9 rocket with almost $400 million, whereas there was a NASA estimate that it would cost $1.6 billion to build a similar kind of vehicle. Why is it so much cheaper for a private company to do that? 

MARKUSIC: When you’re doing something in that heritage space way, you’re inheriting a lot of requirements that can drive cost up. It’s a very risk-averse framework. Many things in the government are like, “You just add money and a person. Here are the instructions—do this thing.” That type of approach is usually pretty reliable in getting the result you want, but it’s really expensive. And it’s usually undergirded by contractors who are disincentivized to make things at the lowest cost. With New Space, you’re spending people’s money; you’re not spending this amorphous blob of taxpayer money. That just pervades the whole culture. 

** China’s Kyushu Yunjian rocket company fires up the gas generator for the “Longyun” Liquid Methane/Liquid Oxygen engine: “Longyun” 80t high thrust engine gas generator passed the assessment – Google Translate

In the second half of the year, Kyushu Yunjian […] will conduct a test of the whole machine test for the “Lingyun” engine. After the whole machine is tested, the “Lingyun” engine will enter the reliability test and assessment stage. The 80-ton “Longyun” liquid oxygen methane engine with greater thrust will also be tested and tested by other components in the second half of the year. Reusable and recycling technology verification rocket platform “Ling Wei” has completed the program demonstration, and is currently undergoing detailed engineering design and optimization.

** EU backed project pursues development of vertical landing reusable rockets.

Five European Companies and the German Aerospace Center (DLR) have teamed up to tackle the shortcoming of
know-how in reusable rockets in Europe, which start upright and land upright after a successful mission. For that,
they commonly decided to investigate and develop key technologies to land rockets backwards. What is state-of-the-
art in the USA is only in its beginnings in Europe, and the consortium is determined to accept the challenge and
to become important players in this game changing technology.

RETALT1 Artwork

RETALT (RETro propulsion Assisted Landing Technologies) is a European project which got funded with 3 Mio. €
by the European Commission in the frame of Horizon 2020. The partnering organizations are the DLR (Germany),
CFS Engineering (Switzerland), Elecnor Deimos (Spain), MT Aerospace (Germany), Almatech (Switzerland) and
Amorim Cork Composites (Portugal).

During the three years of the project lifetime the consortium will investigate the areas of aerodynamics, aerothermodynamics (i.e. the temperatures that evolve at the surface of the vehicle during flight), flight dynamics, guidance, navigation and control, and advanced structural parts, materials and mechanisms. For this purpose, two types of rocket launchers will be investigated which both start and land in an upright position. One of them will have two stages and will be similar to conventional rockets like the Falcon 9 or the Ariane 5 launcher. For this launcher only the first stage will be landed again. The second launcher has only a single stage. It will be designed for the use of smaller payloads and when returning it will break not only with retro propulsion but also with the aid of a large aerodynamic base surface at the bottom.

See also Europe says SpaceX “dominating” launch, vows to develop Falcon 9-like rocket | Ars Technica

** Boeing’s Starliner crew spacecraft passes major milestone with the qualification of the parachute system: Starliner Space Capsule Completes Parachute Testing – Boeing

** The 3rd Annual Spaceport America Cup attracted 120 teams and the UW team was the overall winner: University of Washington Wins Third Annual Spaceport America Cup

Spaceport America, the world’s first purpose-built commercial spaceport and the Experimental Sounding Rocket Association (ESRA), congratulate the University of Washington Society for Advanced Rocket Propulsion as the Champion of the Third Annual Spaceport America Cup. Champions were selected in each category, and the University of Washington team was chosen by judges from the group of category champions as the overall winner.  

From June 18–22, thousands of students and spectators flocked to southern New Mexico from all over the globe, creating an economic and tourism boost for surrounding communities as part of their attendance at the 2019 Spaceport America Cup. This year’s competition was the largest to date, with over 120 teams registered including a large international presence from 14 different countries.

** SpaceX:

**** SpaceX raises more funding for Starlink and Starship development:

“SpaceX is the world’s leading private space launch provider, and we are excited to work with the company in the next phase of its growth as it rolls out its Starlink satellite network,” said Olivia Steedman, Senior Managing Director, TIP.

SpaceX was identified as a compelling investment opportunity for TIP due to its proven track record of technology disruption in the launch space and significant future growth potential in the satellite broadband market. TIP focuses on late-stage venture capital and growth equity investments in companies that use technology to disrupt incumbents and create new sectors.

“Our investment in SpaceX fits well within the TIP investment strategy of capitalizing on significant global opportunities in new businesses and sectors that are emerging as a result of unprecedented technological change,” added Ms. Steedman.

**** Next Dragon Cargo mission to the ISS set for July 21: SpaceX Targeting Sunday, July 21, at 7:35 p.m. for CRS-18 Launch – SpaceX

**** The 24 satellites launched on the latest Falcon Heavy mission are operating:

**** Center-core landing failure due to heat from the high re-entry velocity: SpaceX CEO Elon Musk explains why Falcon Heavy’s center core missed the drone ship – Teslarati

**** The first successful fairing catch took place in the dark in the Atlantic ocean:

**** Satellite image shows post landing activities of the two side boosters:

**** Watching the construction of the Starhopper and StarShip demonstrators is a popular on-line and on-site spectator pastime.

 

**** Elon visits the Starship orbital demonstrator under construction in Florida: SpaceX CEO Elon Musk & Raptor engine make surprise visit to Florida Starship – Teslarati

In what seems to be a coincidence, Musk’s message – either recorded or streamed – was filmed on SpaceX’s Florida Starship development campus, a surprisingly large facility uncovered less than two months ago. The CEO was standing in the sun directly in front of two large segments of the second orbital-class Starship prototype, part of a parallel development process featuring a second Starship prototype (and separate Starhopper) in Texas. Musk’s appearance at Starship Florida is not particularly surprising; if he flew all the way to Florida for Falcon Heavy, might as well tour SpaceX’s newest Florida facilities on the same trip.

**** The Super Heavy Booster/StarShip combo will be quite a sight to see:

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Safe Is Not an Option

Videos: “Space to Ground” ISS report – June.28.2019

Here is this week’s episode of NASA’s Space to Ground report on activities related to the  International Space Station:

** Space Station Research: Intersecting the Magical and the Technical

At any given time, we have about 300 experiments being conducted aboard the International Space Station. Anne McClain shares an inspiring perspective on the research she’s helped conduct. Learn more about the research being conducted on Station: https://www.nasa.gov/iss-science

** NASA astronaut Anne McClain seems more limber and energetic as she emerges from the Soyuz than many others after returning from a long stay on the ISS:

Expedition 59 Flight Engineer Anne McClain of NASA is helped out of the Soyuz MS-11 spacecraft just minutes after she, Canadian Space Agency astronaut David Saint-Jacques, and Roscosmos cosmonaut Oleg Kononenko, landed in Kazakhstan. The trio spent 204 days on the International Space Station, during which they orbited Earth 3,264 times traveling 86,430,555 miles.

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Outpost in Orbit:
A Pictorial & Verbal History of the Space Station

June 30th is Asteroid Day – Events start today

Asteroid Day is

… a dynamic awareness and educational program to inspire  the world about asteroids – their role in the formation of our universe, how we can use their resources, how asteroids can pave the way for future exploration and finally how we can protect our planet from asteroid impacts. Asteroid Day events are held on 30 June each year to mark the anniversary of the 1908 Tunguska impact. Asteroid Day events are largely independently organized around the world for people of all ages and are mostly free-of-charge. Asteroid Day is a program run by the Asteroid Foundation, a Luxembourg nonprofit organization.

Asteroid Day 2019

June 30th is Asteroid Day, but many events are being held globally today through Sunday: Asteroid Day To Celebrate Fifth Anniversary with Thousands of Events Planned Worldwide to Raise Awareness about Asteroids, 27-30 June 2019.

The Asteroid Today channel is now live streaming: ADLIVE from Luxembourg


Watch live video from AsteroidDay on www.twitch.tv

Here is a schedule for Asteroid Day events and panels:

Follow developments and updates at Asteroid Day ☄ (@AsteroidDay) | Twitter.

A new film about asteroid research with next-gen telescopes is making its debut during Asteroid Day:

New Era of Cosmic Discovery” is a short film scheduled to be broadcasted as a part of the Asteroid Day 2019 live program from Luxembourg, from June 26th till July 2nd, 2019. Program schedule: asteroidday.org/broadcast-schedule/ Free streaming available via asteroidday.org/

We are on the brink of an era of cosmic discovery. A new generation of telescopes and astronomical surveys are yielding a 1000-fold increase in the amount of available astronomical data. At the University of Washington and the DiRAC Institute, a team of scientists are writing the software to identify and track objects in the sky that change with time. They are working with LSST [Large Synoptic Survey Telescope] to build the largest census of our Solar System ever undertaken.

Asteroid Day was

… co-founded in 2014, by Dr. Brian May, astrophysicist and lead guitarist of QUEEN, together with Danica Remy, President of B612 Foundation, Rusty Schweickart, Apollo 9 Astronaut, and filmmaker Grig Richters. In 2016, the United Nations officially designated Asteroid Day as the international day of awareness and education about asteroids. Together with the United Nations, space agencies, schools and universities Asteroid Day is organized by networks of supporters who host events worldwide on 30, June and any other day of the year that the independent groups determine.

To initially launch the Asteroid Day education programs in 2014, members of the asteroid community drafted and released a petition to gather public support for asteroid education and called on governments to accelerate the funding of asteroid discovery programs. Today, this petition, the 100X Asteroid Declaration, has been signed by hundreds of prominent individuals around the world, including leaders in science, technology, and business, and more than 125 astronauts.

Thanks to its partners and supporters, and particularly to the Government of Luxembourg, where the Foundation is headquartered, Asteroid Day has made significant strides educating the world about asteroids.  Through our work we share information and teach about the science, opportunities, and risks of asteroids. Since the first events in 2015, the movement has grown exponentially. Through Asteroid Day, we continue to inspire people and young minds to look up into the sky and to be excited about our Solar System.

Here is a video about the history of Asteroid Day narrated by Neil deGrasse Tyson:

Asteroid Day 2019 Poster
Official Asteroid Day 2019 poster art.

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Delta-v

Space sciences roundup – June.26.2019

A sampling of recent articles, videos, and images from space-related science news items:

Asteroids:

** NASA’s OSIRIS-REx probe gets up close to asteroid Bennu : OSIRIS-REx Breaks Another Orbit Record | NASA

On June 12, NASA’s OSIRIS-REx spacecraft performed another significant navigation maneuver—breaking its own world record for the closest orbit of a planetary body by a spacecraft.

The maneuver began the mission’s new phase, known as Orbital B, and placed the spacecraft in an orbit 680 meters (2,231 feet) above the surface of asteroid Bennu. The previous record—also set by the OSIRIS-REx spacecraft—was approximately 1.3 kilometers (0.8 miles) above the surface.

Upon arrival at Bennu, the team observed particles ejecting into space from the asteroid’s surface. To better understand why this is occurring, the first two weeks of Orbital B will be devoted to observing these events by taking frequent images of the asteroid’s horizon. For the remaining five weeks, the spacecraft will map the entire asteroid using most of its onboard science instruments: the OSIRIS-REx Laser Altimeter (OLA) will produce a full terrain map; PolyCam will form a high-resolution, global image mosaic; and the OSIRIS-REx Thermal Emission Spectrometer (OTES) and the REgolith X-ray Imaging Spectrometer (REXIS) will produce global maps in the infrared and X-ray bands. All of these measurements are essential for selecting the best sample collection site on Bennu’s surface.

Data from these surface studies will be used to find the optimum spot to set down and take a sample to take back to Earth.

The OSIRIS-REx spacecraft is on a seven-year journey to study the asteroid Bennu and return a sample from its surface to Earth. This sample of a primitive asteroid will help scientists understand the formation of the Solar System over 4.5 billion years ago. Sample collection is scheduled for summer of 2020, and the spacecraft will deliver the sample to Earth in September 2023.

An artist's view of OSIRIS-REx investigating asteroid Bennu
“On Jun. 12, 2019, NASA’s OSIRIS-REx spacecraft went into orbit around asteroid Bennu for a second time — breaking its own record for the closest orbit of a planetary body by any spacecraft.” Artwork credits: University of Arizona

** Japan’s Hayabusa2 probe may touch down on asteroid Ryugu again: Approach to the 2nd touchdown – Part 1: observations near the touchdown point – JAXA Hayabusa2 project

Our first touchdown took place this year on February 22. Then as a new challenge for the Hayabusa2 Project, we succeeded in creating an artificial crater using the Small Carry-on Impactor (SCI) on April 5. The last big operation left at asteroid Ryugu is the collection of subsurface material exposed with the creation of the artificial crater. In order to collect this material, we need a second touchdown for which the project has been steadily preparing. At this point, it has not yet been decided whether or not to go ahead with a second touchdown, but here we will introduce our preparations in the “Approach to the second touchdown”.

After the operation to form the artificial crater, the spacecraft descended a total of four times above or near the crater site. These descent operations allowed us to obtain detailed data of the region near the artificial crater. In addition, we succeeded in dropping a target marker in the area close to the artificial crater on May 30. Combined, these operations mean that the situation around the artificial crater is now well understood.

The rocky surface, however, makes it difficult to find a safe spot to set down.

As you can see in [the figure below], asteroid Ryugu is covered with boulders. If we go for a second touchdown, we need to aim for a point close to the target marker which has no obstacles. The project is currently examining this area in detail.

Image of Ryugu surface
“Image taken on June 13, 2019 during the operation PPTD-TM1B. This is a composite of 28 images taken at 7 second intervals starting from 10:58 JST (upper left) to 11:01 (lower right) using the Optical Navigation Camera – Telescopic (ONC-T). The image altitude is about 52m at the start and 108m at the end. The white point in the upper-left center is the target marker. You can see that detailed images have been acquired continuously from the target marker to the edge of the artificial crater, located in the lower-right of the image. (Image credit ※: JAXA, Chiba Institute of Technology, University of Tokyo, Kochi University, Rikkyo University, Nagoya University, Meiji University, University of Aizu, AIST.) “

The Sun:

** Lunar regolith reveals secrets of the early sun: Moon Samples Help Scientists Study Ancient Sun | NASA

Saxena incorporated the mathematical relationship between a star’s rotation rate and its flare activity. This insight was derived by scientists who studied the activity of thousands of stars discovered by NASA’s Kepler space telescope: The faster a star spins, they found, the more violent its ejections. “As you learn about other stars and planets, especially stars like our Sun, you start to get a bigger picture of how the Sun evolved over time,” Saxena said.  

Using sophisticated computer models, Saxena, Killen and colleagues think they may have finally solved both mysteries. Their computer simulations, which they described on May 3 in the The Astrophysical Journal Letters, show that the early Sun rotated slower than 50% of baby stars. According to their estimates, within its first billion years, the Sun took at least 9 to 10 days to complete one rotation.  

They determined this by simulating the evolution of our solar system under a slow, medium, and then a fast-rotating star. And they found that just one version — the slow-rotating star — was able to blast the right amount of charged particles into the Moon’s surface to knock enough sodium and potassium into space over time to leave the amounts we see in Moon rocks today.   

“Space weather was probably one of the major influences for how all the planets of the solar system evolved,” Saxena said, “so any study of habitability of planets needs to consider it.” 

Jupiter:

**  More wonderful views of Jupiter created by citizen scientists from Juno’s raw imagery: Tumultuous Clouds of Jupiter | Mission Juno/Kevin M. Gill

This stunning compilation image of Jupiter’s stormy northern hemisphere was captured by NASA’s Juno spacecraft as it performed a close pass of the gas giant planet. Some bright-white clouds can be seen popping up to high altitudes on the right side of Jupiter’s disk. (The Juno team frequently refers to clouds like these as “pop-up” clouds in image captions.)

Juno took the four images used to produce this color-enhanced view on May 29, 2019, between 12:52 a.m. PDT (3:52 a.m. EDT) and 1:03 a.m. PDT (4:03 a.m. EDT), as the spacecraft performed its 20th science pass of Jupiter. At the time the images were taken, the spacecraft was between 11,600 miles (18,600 kilometers) and 5,400 miles (8,600 kilometers) above Jupiter’s cloud tops, above a northern latitude spanning from about 59 to 34 degrees.

Citizen scientist Kevin M. Gill created this image using data from the spacecraft’s JunoCam imager.

Tumultuous Clouds of Jupiter
“Tumultuous Clouds of Jupiter” – Credits NASA/JPL-Caltech/SwRI/MSSS with image processing by Kevin M. Gill.

Gill also made this overflight of Jupiter’s Great Red Spot:

And Gerald Eichstädt made this terrific time-lapsed tour of Jupiter: Juno’s Perijove-20 Jupiter Flyby, Reconstructed in 125-Fold Time-Lapse – Credit: NASA / JPL / SwRI / MSSS / SPICE / Gerald Eichstädt ©

On May 29, 2019, NASA’s Juno probe successfully performed her Perijove-20 Jupiter flyby. The movie is a reconstruction of the 2 hours and 30 minutes between 2019-05-29T07:20:00.000 and 2019-05-29T09:50:00.000 in 125-fold time-lapse. It is based on 32 of the JunoCam images taken, and on spacecraft trajectory data provided via SPICE kernel files.

In steps of five real-time seconds, one still images of the movie has been rendered from at least one suitable raw image. This resulted in short scenes, usually of a few seconds. Playing with 25 images per second results in 125-fold time-lapse. Resulting overlapping scenes have been blended using the ffmpeg tool. In natural colors, Jupiter looks pretty pale. Therefore, the still images are approximately illumination-adusted, i.e. almost flattened, and consecutively gamma-stretched to the 4th power of radiometric values, in order to enhance contrast and color.

Mars:

** Curiosity detects a curious burst in methane levels: Curiosity Detects Unusually High Methane Levels – NASA JPL

On June 23rd, the Curiosity team reported that during the previous week the

… Mars rover found a surprising result: the largest amount of methane ever measured during the mission – about 21 parts per billion units by volume (ppbv). One ppbv means that if you take a volume of air on Mars, one billionth of the volume of air is methane.

The finding came from the rover’s Sample Analysis at Mars (SAM) tunable laser spectrometer. It’s exciting because microbial life is an important source of methane on Earth, but methane can also be created through interactions between rocks and water.

Curiosity doesn’t have instruments that can definitively say what the source of the methane is, or even if it’s coming from a local source within Gale Crater or elsewhere on the planet.

On June 24th, the team reported results from a

… follow-on methane experiment this past weekend. The results came down early Monday morning: The methane levels have sharply decreased, with less than 1 part per billion by volume detected. That’s a value close to the background levels Curiosity sees all the time.

The finding suggests last week’s methane detection – the largest amount of the gas Curiosity has ever found – was one of the transient methane plumes that have been observed in the past. While scientists have observed the background levels rise and fall seasonally, they haven’t found a pattern in the occurrence of these transient plumes.

“The methane mystery continues,” said Ashwin Vasavada, Curiosity’s project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California. “We’re more motivated than ever to keep measuring and put our brains together to figure out how methane behaves in the Martian atmosphere.”

** Curiosity’s travels via Leonard David:

  • Curiosity Mars Rover: Eying Teal Ridge Outcrop – June.25.2019

    “Curiosity is still perched on top of Teal Ridge to investigate a fascinating outcrop that caps the ridge,” reports Kristen Bennett, a planetary geologist at the USGS in Flagstaff, Arizona.Scientists have been characterizing the ridge-capping material, but also devoting time to use the Sample Analysis at Mars (SAM) Instrument Suite to look for methane.

MAHLI-Sol-2444-June-22-2019
“Curiosity Mars Hand Lens Imager (MAHLI) image produced on Sol 2444, June 22, 2019. Credit: NASA/JPL-Caltech/MSSS.” Larger image
  • Curiosity Mars Rover: Ridge Work – June.20.2019

    NASA’s Curiosity Mars rover is now carrying out Sol 2442 duties, parked on Teal Ridge, in the midst of an extended contact science campaign.At this ridge location, new imagery from the robot shows crossbedding in a bedrock layer, as well as a contact between the bedrock outcrop and a rubbly layer below.

Curiosity Navcam - Sol-2442-June-20-2019
A view from Teal Ridge taken by Curiosity’s Navcam – Sol-2442-June-20-2019
“Curiosity Navcam Left B image taken on Sol 2439, June 17, 2019. Credit: NASA/JPL-Caltech.” Larger image.

** Bob Zimmerman reports on interesting Mars images taken from orbit:

  • Strange Martian gullies – June.21.2019 – Bob finds the gullies in the image “Older Gullies and Channels” below fascinating –

    … because they appear to be some form of erosion drainage coming down both sides of a high ridge near the northern rim of this large apparently unnamed crater in the southern cratered highlands of Mars, to the west of Hellas Basin.On Earth my immediate explanation for this erosion would be a major monsoon-like storm, such as we get here in the southwest and call “gully-washers.” When a lot of water is quickly dumped onto a hill where there is not of vegetation to help bind the soil together, the water will quickly carve out gullies that looks almost exactly like these.

Older Gullies and Channels in Slopes of Softened Large Crater
Older Gullies and Channels in Slopes of Softened Large Crater – HiRISE

On Mars, who knows? It certainly wasn’t a monsoon thunderstorm that did this. And being in the Martian southern highlands it is unlikely it was from an ocean of any kind. Were there lakes here? Past research has found places where lakes might have existed on Mars, but these places are far north in the transitional zone into the northern lowlands.

  • Mass wasting on Mars – June.19.2019Mass wasting is a term that geologists use to describe a specific kind of avalanche, where the material moves down slope suddenly in a single mass.The image [below], taken from the image archive of the high resolution camera on Mars Reconnaissance Orbiter (MRO) and cropped and reduced in resolution to post here, shows a dramatic example of this kind of avalanche. You can see two separate avalanches, each of which moved a significant blob of material down slope into the center of the crater floor.

  • Wind and/or water erosion on the Martian northern lowlands – June.17.2019The picture [below], cropped and reduced in resolution to show here, was taken by the high resolution camera on Mars Reconnaissance Orbiter on April 21, 2019, and shows the erosion process produced by either wind or water as it flowed from the east to the west past one small mesa.It is almost certain that the erosion here was caused by wind, but as we don’t know when this happened, it could also be very old, and have occurred when this terrain was at the bottom of the theorized intermittent ocean that some believe once existed on these northern lowlands. The location itself, near the resurgences for Marineris Valles and the other drainages coming down from the giant volcanoes, might add weight to a water cause, except that the erosional flow went from east to west, and the resurgences were coming from the opposite direction, the west and the south.
Topographic Interactions in Vastitas Borealis
Topographic Interactions in Vastitas Borealis. HiRISE at U. of Arizona.

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I Was a Teenage Space Reporter:
From Apollo 11 to Our Future in Space

Everyone can participate in space