Phoenix Descent Captured by HiRISE – A Breathtaking View

The Phoenix lander plus parachute, descending in front of a huge Mars crater (NASA/HiRISE)

Its images like these that restore your faith in mankind’s exploration spirit. After the flawless entry, descent and landing of Phoenix on Sunday night at 16:54 PST (00:54 GMT Monday morning), I took some time to contemplate the enormity of what the amazing team at NASA and the University of Arizona had achieved. I was a bit concerned as to whether the lander would make it through the “7 minutes of terror”, especially when thinking back to the silence that followed the UK’s Beagle 2 landing on Christmas Day, 2003. But it did make it, and with bags of confidence. Then we are flooded with news and images from the Red Planet, but one photo stood out from the rest. A photo, from an orbiting Mars satellite, looking down on Phoenix, floating through the Martian atmosphere, with a 10 km-wide crater as a backdrop. It doesn’t get much better than this…
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The Eden Project and Mars Settlement

The Eden Project, nr. St Austell (©Ian O'Neill)

On our travels last week, we decided to stop off at the Eden Project down near St. Austell in Cornwall for a few hours. It’s been one of those places I’ve always wanted to visit, especially since my involvement with the Mars Foundation. Well known in the UK for its “Biomes” – huge geodesic domes composed of hexagonal cushions of flexible but durable plastic – the project supports a huge number of plants and animals from around the globe. So, apart from looking pretty cool, why have I decided to mention it on astroengine? Well, Eden hasn’t only inspired environmentalists, it could aid the future design and implementation of structures beyond Earth…
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Interview: Dr Adrian Brown, Mars Reconnaissance Orbiter Scientist

Conceptual image depicting the Mars Reconnaissance Orbiter in an elliptical low-planet orbit around Mars (NASA)

In my capacity as Mars Foundation Communications Officer, I was asked to approach one of the mission scientists working with The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument on board the Mars Reconnaissance Orbiter (MRO). The Foundation has an acute interest in CRISM as its main task is to look for water (past and present) and certain minerals on the Martian surface. We are currently investigating Mars settlement designs, so any indication about the location of these quantities will be of huge interest to us (especially as our “Hillside Settlement” will require colonists to use local materials when and where possible). In an enlightening interview, SETI Institute principal investigator Dr Adrian Brown detailed some of the important discoveries to come out of CRISM and how it may be of use to future colonists…
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Mars Dunes and the Dynamics of Sand

Martian sand dunes, shaped like terrestrial barchan dunes (HiRISE/NASA/UA)
Martian sand dunes, shaped like terrestrial barchan dunes (HiRISE/NASA/UA)

The sand dunes on the surface of Mars closely resemble their terrestrial cousins, only bigger. Formed from wind-driven sand and dust, the Martian versions can grow ten-times bigger than any dunes we have on Earth. The High Resolution Imaging Science Experiment (HiRISE) on board NASA’s Mars Reconnaissance Orbiter (MRO) has been taking shots of these distinctive shapes, and although there are examples all over the planet, they seem to have the same characteristics no matter where they form or how they swarm. Now researchers are investigating how these Mars dunes grow and why they are so large…

On the 11th April, I reported on some new HiRISE images of barchan sand dunes that appeared to form on the Red Planet. In this particular case, a flat-topped mountain (or mesa) was being ravaged by the Martian wind, sweeping fine grains of sand and dust downstream. What formed in the mesa’s wake turned out to be quite impressive. Long strands of sand banks, stretching hundreds of miles beyond the mesa mixed with swarms of similarly-shaped dunes. What struck me were the impressive similarities with Earth-based sand dunes we find on our beaches and deserts.

The characteristics of a terrestrial barchan dune (
The characteristics of a terrestrial barchan dune (

Since this initial report, I have found HiRISE to be quite a prolific dune-seeker. On April 16th, HiRISE released more images of sand dunes in the northern polar regions of Mars, some heavily eroded (pictured below), and others tightly packed and clumsily shaped. I was intrigued. As you may have noticed from some of the Mars stories I cover, I like to see terrestrial processes happening on the surface of Mars. Seeing an impressive Mars avalanche, or a simple rock rolling down a hill, I love it. I think it gives us a special connection with an alien world when we can see processes we commonly associate with Earth happening on an eroding Mars.

The dissappearing dunes at northern latitudes (NASA/JPL/UA)
The dissappearing dunes at northern latitudes (NASA/JPL/UA)

So what processes are behind these giant Mars dunes? It might seem obvious (wind blowing sand ain’t that hard to understand after all), but researchers at the Federal University of Ceará in Fortaleza, Brazil have been modelling the effects that the tenuous Mars atmosphere and weak gravity have on sand dune construction. Murilo Almeida and his team have found that when blown around on the surface of Mars, grains of sand “bounce” much higher than their terrestrial counterparts. In fact, they bounce 100 times higher and further. They are also blown 10 times faster. This has the effect of producing a series of sand dunes with very long wavelengths.

This also has a knock-on effect as a possible mechanism that drives the savage dust storms in the thin atmosphere. As there is more bouncing action in Martian grains of sand than here on Earth, more dust particles are thrown aloft and suspended in the air.

Almeida’s work is published in the Proceedings of the National Academy of Sciences (DOI: 10.1073/pnas.0800202105)

Source: New Scientist

Will the First Mars Settlements have Internet Access?

A map on terrestrial internet. Credit: Lanet-vi program of I. Alvarez-Hamelin et al.

Imagine that you have just set up camp on Mars. Everything is up and running. You and your team have not only survived the journey from Earth, you’ve also made it through fiery re-entry and landed within a metre of your planned location. Success! So you crack open a miniature bottle of vintage whisky bottled in the year 2000 and share a sip with your companions. You want to tell the world, you want to check in with your family to say that you are “OK”.

It would be very poor if you were restricted to relaying a message though mission controllers. Simply “phoning home” for a chat wouldn’t be possible (the lag time between sentences would be at least 16 minutes). Could there be a way of sending emails? Possibly; voice messages will be fine too. But could our explorers set up a website or some “Mars blog” to document their travels? This could obviously be done remotely, with a terrestrial website, but there are strong arguments for a distributed Internet service on the Red Planet too. Can a “MarsNet” or “RedNet” be integrated with Earth’s Internet, establishing an “Interplanetary Internet”?
Continue reading “Will the First Mars Settlements have Internet Access?” Roundup and Opinion

It’s been a while since I last posted as I’ve been flying from the US to the UK and have only just gotten my office up and running. That’s not to say I haven’t been writing. On the Universe Today, I’ve posted quite a few articles ranging from quite an elaborate April Fools story (but not quite as elaborate as Virgin and Google’s Virgle prank), to a black hole hiding in the middle of Omega Centauri, to rocks rolling around on Mars… here’s a round up of the most interesting…
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Daily Roundup: The Mars Curse and the Biggest Explosion in the Universe!

The largest ever gamma ray burst observed. Image credit: NASA

This week has been an exciting week for astronomers. The largest explosion ever seen in the Universe was observed on Wednesday. This gamma ray burst, produced when a star collapses in on itself to create a black hole, is a record breaker. Not only is it the biggest explosion mankind has seen since records began, it is also the furthest and oldest “thing” we have ever observed…
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Daily Roundup: Astrium Spacecraft Mass Production, Saturn’s Rings and Quantum Communications

Astriums new concept for space tourism. Image credit: Astrium/Marc Newson. Source: BBC

It looks like things are really beginning to develop for the space tourism era. European rocket manufacturer Astrium has announced plans to develop the next generation of small space planes capable of sending 5 people into space. This design is different from the rest as it will take-off and land conventionally and will use jets for atmospheric flight but blast into space with a powerful oxygen-methane rocket. The promo video is also pretty exciting, documenting the two hour flight by means of a simulation…
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Could Mars Quakes, Seasonal Temperature Changes or a Chance Meteorite Impact Cause Mars Avalanches?

Detailed view of one of the avalanches observed by the HiRISE instrument in the Mars North Pole region. Image credit: NASA/JPL/UA

It doesn’t get much better than this. A robotic orbiter snaps a photo hundreds of miles above the surface of an alien planet, capturing a geological event as it happens. Yes, we’ve seen Io’s immense volcanoes erupt, and we’ve seen huge storms rage on Jupiter, but often these large-scale planetary events are too massive for us to put into context and so we file them under “astronomy”. But, when we see an event like an avalanche on Mars, we can relate it with events on Earth, we have a “feel” for what this means. Suddenly an avalanche on Mars holds a special meaning to us; we instantly have a connection with other planets in our Solar System.

And now for the question… what caused the four near-simultaneous avalanches recently observed by the Mars Reconnaissance Orbiter?
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Daily Roundup: “It Ain’t Water On Mars” and Some Want UK Astronauts, But Others Don’t

Simulations of dry debris flow and water flow when compared with HiRISE observations. Figure credit: Jon Pelletier, University of Arizona

There has been much debate surrounding observations by the artificial satellites orbiting Mars, but with one discovery, the debate was… non-debatable. Liquid water was flowing (albeit quickly) across the Martian surface intermittently, creating river-like channels flowing down crater sides. But that was until a group of University of Arizona scientists tackled the situation. To their surprise it wasn’t water that was flowing, it was something entirely different…
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