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Friday, August 30, 2019

NASA Mars 2020 Rover Gets Saddled With Helicopter Sidekick

NASA's Mars 2020 rover gets saddled with helicopter sidekick

    Engineers have attached what could be the first ever helicopter to fly on another world, to NASA’s Mars 2020 rover. The robotic duo is set to be launched into space atop a United Launch Alliance Atlas V rocket in July next year, and will arrive at their destination on February 18, 2021.
    The Mars Helicopter has no scientific goals of its own beyond proving that it is possible to fly an autonomous aircraft through the super-thin Martian atmosphere. The drone carries a single 13-megapixel camera, no science instruments, and weighs in at just under 4 lb (1.8 kg).
    The dual-blade, solar-powered helicopter has been subjected to stringent testing designed to assess not only its ability to fly, but also whether it can survive the tumultuous environment of launch and re-entry, not to mention the frigid space environment that it must endure during transit.
    NASA engineers attached the helicopter and its delivery system to a plate on the rover’s underbelly. The now integrated drone will remain in its protective cocoon while traveling through interplanetary space, and during re-entry and landing.
    The target site for the mission is an impact site known as Jezero Crater. The region boasts ancient terrain formations, some of which are thought to date back 3.6 billion years. An analysis of the landing site could provide clues as to the habitability of ancient Mars and how that world evolved into the one we know today.
    The helicopter will be released from the rover between 60-90 Martian days after landing on the Red Planet. Having dropped the drone to the surface, the rover will drive a short distance away, allowing its aerial accomplice to spread its rotors, and prepare to explore its new home.
    NASA engineers cover the main body of the Mars Helicopter in a protective thermal film
    NASA engineers cover the main body of the Mars Helicopter in a protective thermal film
     
    NASA/JPL-Caltech
    If successful, the Mars Helicopter is expected to attempt up to five flights over the course of a 30-day period. Each foray will last up to 90 seconds, and could see the drone rise up to 15 ft (4.5 m) above the barren Martian surface.
    Should these tests be a success, future crewed and robotic missions could make use of the next generation of autonomous drones to add an aerial element to exploration and path finding tasks. For example, the helicopters could be used to explore regions that would be too hazardous to the wheels of a rover, or that could even put an astronaut’s safety at risk.
    Alongside receiving its aerial sidekick, the Mars 2020 rover is also due to get a new name. NASA is inviting kindergarten and school students living in the US to submit essays to rename the rover prior to launch. The deadline is November 1, 2019, and the winner of the competition will be invited to watch the rover launch from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida in July 2020.
    Leading up to the launch you can sign up to become part of the mission by submitting your name to be etched in microscopic size on a chip that will be mounted on the robotic explorer as it trundles across the surface of the Red Planet.
    ...

    Sunday, August 18, 2019

    Huge Subsurface Lake Found On Mars

    Huge lake of liquid water found on Mars

    A huge liquid water lake has been found on Mars, stretching 20 km (12.4 mi) and...
    A huge liquid water lake has been found on Mars, stretching 20 km (12.4 mi) and buried beneath 1.5 km (0.9 mi) of ice at the Red Planet's south pole(Credit: ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO)
    A huge lake of liquid water has been found on Mars. The groundbreaking discovery comes after years of evidence of the Red Planet's watery past and icy present, but this is the first time a significant amount of the life-giving liquid has been detected. Discovered through satellite radar readings, the lake lies beneath the ice caps at the south pole of Mars, and has profound implications for future missions and the search for extraterrestrial life.
    According to its discoverers, the lake lies below 1.5 km (0.9 mi) of solid ice, and stretches 20 km (12.4 mi) wide. Although temperatures at that spot plummet to about -68° C (-90° F), the water remains in a liquid form thanks to the heavy presence of sodium, magnesium and calcium salts. This, along with the immense pressure of the ice from above, lowers the freezing point.
    The discovery was made by astronomers using the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) onboard the Mars Express orbiter. This instrument beams radar pulses down to the planet's surface and measures how the waves reflect back to the spacecraft, which can tell scientists what kind of materials lie down there, even below the surface.
    Using MARSIS to survey a region around the south pole of the Red Planet, the team collected 29 sets of radar samplings between May 2012 and December 2015. A section of this area returned very sharp changes in the radar signals, showing up as a bright spot in the image that's consistent with a water interface. The radar profile, the researchers say, closely matches those of subglacial lakes here on Earth, beneath the ice sheets of Greenland and Antarctica.
    Although it seems like "water found on Mars" headlines have been doing the rounds for years, this discovery is really what it's all been building to. The majority of modern Mars is dry and barren, but plenty of evidence has been found that the Red Planet used to be a much wetter place. NASA studies suggest a vast ocean covered the planet's northern hemisphere some 4.3 billion years ago, and lakes may have filled and emptied repeatedly over tens of millions of years in places like Gale Crater, the landing site of the Curiosity rover.
    Nowadays, water exists on the Red Planet in the form of trace amounts of vapor in the atmosphere, or locked away in underground ice sheets and mineral compounds. Any liquid water was believed to be transitional, pooling in short-lived microscopic puddles or flowing down hillsides in the Martian summer.
    The discovery of a large, stable reserve of liquid water on Mars is massive, giving us new potential targets for future missions and places to search for signs of past or present microbial life – although the sheer saltiness of it might kill those hopes.
    The research was published in the journal Science.
    ...

    Friday, August 16, 2019

    Lost In Space

    Lost in Space

    There may well be life on the moon now, and humans are responsible for it.
    Recently, the privately funded Israeli lander Beresheet released one of Earth’s hardiest creatures after accidentally crash-landing on the moon’s surface, the Guardian reported.
    Scientists believe that thousands of tiny tardigrades – also known as water bears or moss piglets – are the only survivors of the incident since they are almost indestructible.
    The microscopic eight-legged creatures can shrug off fatal conditions by turning into a dormant seed-like pod, which allows them to survive high temperatures, radiation and the vacuum of space – to name just a few calamities. To bring them back to life, just add water.
    “Tardigrades can survive pressures that are comparable to those created when asteroids strike Earth, so a small crash like this is nothing to them,” according to tardigrade researcher Lukasz Kaczmarek.
    In their dormant state, it appears that even the aging process stops – a trait with obvious implications for any future space colonization efforts.
    “It may be that we can use this in the future if we plan missions to different planets, because we will need to be young when we get there,” Kaczmarek said.
    Despite the tiny animals’ superhuman abilities, any sleeping survivors of Beresheet’s crash won’t be colonizing the moon. Earth’s satellite lacks the liquid water needed to reactivate them.

    Thursday, August 15, 2019

    Tuesday, August 6, 2019

    The Space Review: Review: Origins of 21st-Century Space Travel

    The Space Review: Review: Origins of 21st-Century Space Travel

    The Space Review: The role of the Universal Declaration of Human Rights in supporting space property rights

    The Space Review: The role of the Universal Declaration of Human Rights in supporting space property rights

    The Space Review: The International Lunar Decade: A strategy for sustainable development

    The Space Review: The International Lunar Decade: A strategy for sustainable development

    The Space Review: China’s grand strategy in outer space: to establish compelling standards of behavior

    The Space Review: China’s grand strategy in outer space: to establish compelling standards of behavior

    The Space Review: Solar sailing, at long last

    The Space Review: Solar sailing, at long last

    New Finds for Mars Rover, Seven Years After Landing

    New Finds for Mars Rover, Seven Years After Landing: NASA's Curiosity rover is discovering odd rocks halfway into a region called the 'clay-bearing unit.'

    Saturday, August 3, 2019