Friday September 21, 2018

NASA’s Asteroid-chasing Spacecraft Osiris-Rex Swinging by Earth on Way to Space Rock

0
//
51
spacecraft
Artist concept of OSIRIS-REx at asteroid Bennu, a remnant from the dawn of the solar system that may hold clues to the origins of life. Credit: NASA’s Goddard Space Flight Center/Conceptual Image Lab. VOA
Republish
Reprint

NASA’s asteroid-chasing spacecraft is swinging by Earth on its way to a space rock.

Launched a year ago, Osiris-Rex will pass within about 11,000 miles (17,700 kilometers) of the home planet Friday afternoon. It will use Earth’s gravity as a slingshot to put it on a path toward the asteroid Bennu.

Also Read: NASA’S OSIRIS-REX mission to flyby Earth on Friday 

If all goes well, Osiris-Rex should reach the small, roundish asteroid next year and, in 2020, collect some of its gravel for return to Earth.

Friday’s close approach will occur over Antarctica. It will be a quick hello: The spacecraft will speed by at about 19,000 mph (31,000 kph). NASA has taken precautions to ensure Osiris-Rex does not slam into any satellites. Ground telescopes, meanwhile, have been trying to observe the spacecraft while it’s in the neighborhood.

(VOA)

Click here for reuse options!
Copyright 2017 NewsGram

Next Story

NASA’s TESS Discovers New Worlds Only 5 Months After Its Launch

With four special cameras, TESS uses a detection method called transit photometry.

0
TESS
TESS, the Transiting Exoplanet Survey Satellite, is shown in this conceptual illustration obtained by Reuters on March 28, 2018. NASA sent TESS into orbit from the Kennedy Space Center in Florida aboard a SpaceX Falcon 9 rocket. VOA

A planet-hunting orbital telescope designed to detect worlds beyond our solar system discovered two distant planets this week five months after its launch from Cape Canaveral, Florida, officials said on Thursday.

NASA’s Transiting Exoplanet Survey Satellite, better known as TESS, made an early discovery of “super-Earth” and “hot Earth” planets in solar systems at least 49 light-years away, marking the satellite’s first discovery since its April launch.

TESS is on a two-year, $337 million mission to expand astronomers’ known catalog of so-called exoplanets, worlds circling distant stars.

TESS
TESS Deputy Science Director Sara Seager. VOA

While the two planets are too hot to support life, TESS Deputy Science Director Sara Seager expects many more such discoveries.

“We will have to wait and see what else TESS discovers,” Seager told Reuters. “We do know that planets are out there, littering the night sky, just waiting to be found.”

TESS is designed to build on the work of its predecessor, the Kepler space telescope, which discovered the bulk of some 3,700 exoplanets documented during the past 20 years and is running out of fuel.

NASA expects to pinpoint thousands more previously unknown worlds, perhaps hundreds of them Earth-sized or “super Earth” sized — no larger than twice as big as our home planet.

Those are believed the most likely to feature rocky surfaces or oceans and are thus considered the best candidates for life to evolve. Scientists have said they hope TESS will ultimately help catalog at least 100 more rocky exoplanets for further study in what has become one of astronomy’s newest fields of exploration.

 

TESS
An artist’s concept provided by NASA shows the Keplar Spacecraft moving through space. VOA

 

MIT researchers on Wednesday announced the discovery of Pi Mensae c, a “super-earth” planet 60 light-years away orbiting its sun every 6.3 days. The discovery of LHS 3844 b, a “hot-earth” planet 49 light-years away that orbits its sun every 11 hours, was announced on Thursday.

Pi Mensae c could have a solid surface or be a waterworld as the composition of such planets is a mixed bag, Martin Spill, NASA’s program scientist for TESS, said in a phone interview.

The two newest planets, which still need to be reviewed by other researchers, offer the chance for follow-up study, officials said.

Also Read: Parker Solar Probe of NASA Sends Back Its First Images

“That, of course, is TESS’ entire purpose — to find those planets around those brightest nearby stars to do this really detailed characterization,” Spill said.

With four special cameras, TESS uses a detection method called transit photometry, which looks for periodic dips in the visible light of stars caused by planets passing, or transiting, in front of them. (VOA)

Next Story