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  • NASA’s New Planet Hunting Probe Set to Search for Alien Life

    By NE Reporter on April 12, 2018

    WASHINGTON:
    A new NASA satellite, which will hunt for exoplanets that have the potential to harbour alien life, is on schedule to launch next week.
    The Transiting Exoplanet Survey Satellite (TESS), will launch from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida on April 16, at 6:32 pm (EDT).
    “We expect TESS will discover a number of planets whose atmospheric compositions, which hold potential clues to the presence of life, could be precisely measured by future observers,” said George Ricker, TESS principal investigator.
    With the help of a gravitational assist from the Moon, the spacecraft will settle into a 13.7-day orbit around Earth. Sixty days after launch, and following tests of its instruments, the satellite will begin its initial two-year mission. The satellite, developed by scientists at Massachusetts Institute of Technology (MIT) in the US, aims to discover thousands of nearby exoplanets, including at least 50 Earth-sized ones.
    The spacecraft, not much larger than a refrigerator, carries four cameras that will survey the nearest, brightest stars in the sky for signs of passing planets. TESS will spend two years scanning nearly the entire sky – a field of view that can encompass more than 20 million stars.
    The first year of observations will map the 13 sectors encompassing the southern sky, and the second year will map the 13 sectors of the northern sky. The spacecraft will be looking for a phenomenon known as a transit, where a planet passes in front of its star, causing a periodic and regular dip in the star’s brightness.
    NASA’s Kepler spacecraft used the same method to spot more than 2,600 confirmed exoplanets, most of them orbiting faint stars 300 to 3,000 light-years away.
    “We learned from Kepler that there are more planets than stars in our sky, and now TESS will open our eyes to the variety of planets around some of the closest stars,” said Paul Hertz, Astrophysics Division director at NASA Headquarters.
    The TESS science team at MIT aims to measure the masses of at least 50 small planets whose radii are less than four times that of Earth. Many of TESS’s planets should be close enough to our own that, once they are identified by TESS, scientists can zoom in on them using other telescopes, to detect atmospheres, characterize atmospheric conditions, and even look for signs of habitability.
    “TESS is kind of like a scout,” said Natalia Guerrero, deputy manager of TESS Objects of Interest, an MIT-led effort that will catalogue objects captured in TESS data that may be potential exoplanets.
    “We’re on this scenic tour of the whole sky, and in some ways we have no idea what we will see. It’s like we’re making a treasure map,” Guerrero said.
    After TESS launches, the team expects that the satellite will reestablish contact within the first week, during which it will turn on all its instruments and cameras. Then, there will be a 60-day commissioning phase, as engineers at NASA and MIT calibrate the instruments and monitor the satellite’s trajectory and performance.
    After that, TESS will begin to collect and downlink images of the sky. Scientists at MIT and NASA will take the raw data and convert it into light curves that indicate the changing brightness of a star over time.

    Iscea

    NE Reporter

    NASA satelliteSearch for Alien LifespacecraftTESSTransiting Exoplanet Survey Satellite

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