NASA's
Transiting Exoplanet Survey Satellite (TESS)
will search the brightest stars in our galactic neighborhood for evidence of planets. Its mission starts today, when it blasts off from Cape Canaveral aboard a SpaceX Falcon 9 rocket, heading into a highly elliptical orbit around the Earth.
The launch window opens at 6:51 pm eastern daylight time today, and
closes just 30 seconds later
.
You can watch the action unfold here (SpaceX will start their webcast about 15 minutes before launch) or on our Facebook page:
If all goes well, TESS will be deployed 48 minutes after launch. SpaceX will attempt to land the rocket on the
drone ship
“Of Course I Still Love You.” The mission was initially scheduled to launch on Monday evening but was postponed to accommodate
last-minute analysis
of some aspect of the guidance, navigation, and control systems.
Over the next two years, TESS will scan the entire sky piece by piece. With its four powerful cameras, it will watch a segment of the sky for 27 days, monitoring stars within that swath for
short dips in brightness
that might indicate the presence of a planet. Then, it will move on to the next patch of sky.
The stars that TESS will focus on are relatively close, within 300 light-years of our own planet. That’s close enough that other advanced telescopes could follow up on promising planetary discoveries, and look into the composition of those planets’ atmospheres.
TESS is heading for an
orbit known as P/2
, which will take it as far away as 232,000 miles away from Earth, and as close as 67,000 miles, orbiting the Earth every 13.7 days. After launch, it will take TESS about
60 days
to
reach its final orbit
.
At it closest point to Earth, TESS will send that data back to scientists on Earth, a process that will take
about 9 hours
each time. Researchers expect to monitor over 200,000 stars, looking for planets within those stars' habitable zones, where liquid water might exist on the surface. Based on the incredible discoveries of Kepler, researchers hope that TESS will find thousands of new planets, this time in our celestial backyard. Data will start coming back to scientists later this year.
