sunset from behind the wire

sunset from behind the wire

Friday, April 20, 2018

TESS


NASA's Transiting Exoplanet Survey Satellite (TESS) launched on the first-of-its-kind mission to find worlds beyond our solar system, including some that could support life. 

Researchers will use spectroscopy to determine a planet's mass, density and atmospheric composition. Water, and other key molecules, in its atmosphere can give us hints about a planets' capacity to harbor life.

The satellite successfully launched on a SpaceX Falcon 9 on April 18, 2018.



NASA's Transiting Exoplanet Survey Satellite (TESS) launched on the first-of-its-kind mission to find worlds beyond our solar system, including some that could support life.

TESS, which is expected to find thousands of new exoplanets orbiting nearby stars, lifted off at 6:51 p.m. EDT Wednesday on a SpaceX Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida. At 7:53 p.m., the twin solar arrays that will power the spacecraft successfully deployed.
"We are thrilled TESS is on its way to help us discover worlds we have yet to imagine, worlds that could possibly be habitable, or harbor life," said Thomas Zurbuchen, associate administrator of NASA's Science Mission Directorate in Washington. "With missions like the James Webb Space Telescope to help us study the details of these planets, we are ever the closer to discovering whether we are alone in the universe."
Over the course of several weeks, TESS will use six thruster burns to travel in a series of progressively elongated orbits to reach the Moon, which will provide a gravitational assist so that TESS can transfer into its 13.7-day final science orbit around Earth. After approximately 60 days of check-out and instrument testing, the spacecraft will begin its work.
"One critical piece for the science return of TESS is the high data rate associated with its orbit," said George Ricker, TESS principal investigator at the Massachusetts Institute of Technology's (MIT) Kavli Institute for Astrophysics and Space Research in Cambridge. "Each time the spacecraft passes close to Earth, it will transmit full-frame images taken with the cameras. That's one of the unique things TESS brings that was not possible before."
For this two-year survey mission, scientists divided the sky into 26 sectors. TESS will use four unique wide-field cameras to map 13 sectors encompassing the southern sky during its first year of observations and 13 sectors of the northern sky during the second year, altogether covering 85 percent of the sky.

TESS will be watching for phenomena called transits. A transit occurs when a planet passes in front of its star from the observer's perspective, causing a periodic and regular dip in the star's brightness. More than 78 percent of the approximately 3,700 confirmed exoplanets have been found using transits.

NASA's Kepler spacecraft found more than 2,600 exoplanets, most orbiting faint stars between 300 and 3,000 light-years from Earth, using this same method of watching for transits. TESS will focus on stars between 30 and 300 light-years away and 30 to 100 times brighter than Kepler's targets.

The brightness of these target stars will allow researchers to use spectroscopy, the study of the absorption and emission of light, to determine a planet's mass, density and atmospheric composition. Water, and other key molecules, in its atmosphere can give us hints about a planets' capacity to harbor life.

Or are we alone in this part of the galaxy? Ancient Astronaut theorists have weighted in on their TV show on the History Channel.

4 comments:

  1. Yes they have. Middle son thinks the History Channel should change its name to the Theory Channel, or something like that.
    Will be interesting to see what it finds.

    ReplyDelete
    Replies
    1. "The Theory Channel" - pretty funny.

      Yes, we have learned a lot by sending complicated robots into space. TESS is but one more sensor system that will look at exceptionally distant objects and will try to make sense of them.

      Delete
  2. Interesting. And I'm not saying the tiny Anglican Church of Canada (ACoC) orbits around a distant, dying sun, but I'm not saying it doesn't, either.

    ReplyDelete
    Replies
    1. Lives in a totally different universe?

      Delete

It's virtual - it's a mirage - it's life