nasa spacecraft found orig al_00000000.jpg
nasa spacecraft found orig al_00000000.jpg
Now playing
00:48
Missing NASA spacecraft found after 2 years
NASA releases first ever ISS video shot at 8K
NASA
NASA releases first ever ISS video shot at 8K
Now playing
01:16
NASA shoots first 8K video of Earth
NASA
Now playing
00:59
Why did NASA launch 450,000 gallons of water?
In this photo released by NASA, the Northrop Grumman Antares rocket, with Cygnus resupply spacecraft onboard, launches from Pad-0A, Saturday, Nov. 17, 2018 at NASA's Wallops Flight Facility in Va. (Joel Kowsky/NASA via AP)
Joel Kowsky/NASA/AP
In this photo released by NASA, the Northrop Grumman Antares rocket, with Cygnus resupply spacecraft onboard, launches from Pad-0A, Saturday, Nov. 17, 2018 at NASA's Wallops Flight Facility in Va. (Joel Kowsky/NASA via AP)
Now playing
00:34
Watch NASA launch cargo ship into space
SANTA BARBARA, CA - OCTOBER 07: The SpaceX Falcon 9 rocket (R) separates from the space craft (L) behind the rocket trail after launching from Vandenberg Air Force Base carrying the SAOCOM 1A and ITASAT 1 satellites, as seen on October 7, 2018 near Santa Barbara, California. After launching the satellites, the Falcon 9 rocket successfully returned to land on solid ground near the launch site rather than at sea. The satellites will become part of a six-satellite constellation that will work in tandem with an Italian constellation known as COSMO-SkyMed.    (Photo by David McNew/Getty Images)
David McNew/Getty Images
SANTA BARBARA, CA - OCTOBER 07: The SpaceX Falcon 9 rocket (R) separates from the space craft (L) behind the rocket trail after launching from Vandenberg Air Force Base carrying the SAOCOM 1A and ITASAT 1 satellites, as seen on October 7, 2018 near Santa Barbara, California. After launching the satellites, the Falcon 9 rocket successfully returned to land on solid ground near the launch site rather than at sea. The satellites will become part of a six-satellite constellation that will work in tandem with an Italian constellation known as COSMO-SkyMed. (Photo by David McNew/Getty Images)
Now playing
01:09
SpaceX rocket launch lights up evening sky
JAXA astroid ryugu images
Twitter / @haya2e_jaxa
JAXA astroid ryugu images
Now playing
00:33
Robot sends new images from asteroid's surface
Massive structure on Saturn
NASA
Massive structure on Saturn
Now playing
01:05
New vortex discovered above Saturn
The SpaceX launch of a Falcon 9 rocket marks another milestone for Kennedy Space Center's Launch Complex 39-A.
NASA
The SpaceX launch of a Falcon 9 rocket marks another milestone for Kennedy Space Center's Launch Complex 39-A.
Now playing
02:00
60 years of NASA's history in 120 seconds
NASA TV
Now playing
01:39
Watch NASA launch probe that will explore sun
nasa lagoon nebula new images lon orig_00000000.jpg
NASA
nasa lagoon nebula new images lon orig_00000000.jpg
Now playing
01:19
Stunning virtual tour of the Lagoon Nebula
Artist's concept of the Solar Probe Plus spacecraft approaching the sun. In order to unlock the mysteries of the corona, but also to protect a society that is increasingly dependent on technology from the threats of space weather, we will send Solar Probe Plus to touch the sun.
Johns Hopkins University Applied Physics Laboratory/NASA
Artist's concept of the Solar Probe Plus spacecraft approaching the sun. In order to unlock the mysteries of the corona, but also to protect a society that is increasingly dependent on technology from the threats of space weather, we will send Solar Probe Plus to touch the sun.
Now playing
00:59
Listen: The sun is not silent
NASA's Goddard Space Flight Center/David Ladd
Now playing
01:26
Breathtaking virtual tour of the Moon in 4K
This composite image, derived from data collected by the Jovian Infrared Auroral Mapper (JIRAM) instrument aboard NASA's Juno mission to Jupiter, shows the central cyclone at the planet's north pole and the eight cyclones that encircle it.
NASA/JPL-Caltech/SwRI/ASI/INAF/JIRAM
This composite image, derived from data collected by the Jovian Infrared Auroral Mapper (JIRAM) instrument aboard NASA's Juno mission to Jupiter, shows the central cyclone at the planet's north pole and the eight cyclones that encircle it.
Now playing
01:02
NASA mission discovers Jupiter's inner secrets
N.R.Fuller, National Science Foundation
Now playing
00:46
'Fingerprint' of earliest light in universe detected
Now playing
00:46
'Super blue blood moon' lights up the skies
what is a black moon orig jpm_00000000.jpg
NASA
what is a black moon orig jpm_00000000.jpg
Now playing
01:04
What's in a moon's name?

Story highlights

NASA has contacted spacecraft after almost two years

Communication was lost during a test of the spacecraft's timer

CNN —  

Despite almost two years of silence, NASA never stopped searching for its long lost spacecraft STEREO-B.

This week that determination paid off.

READ: Philae: The bouncing baby space probe that gave itself another chance

Spacecraft STEREO-A and STEREO-B are studying the sun.
Courtesy NASA
Spacecraft STEREO-A and STEREO-B are studying the sun.

NASA announced Sunday that it had re-established contact with STEREO-B after communications were lost in October 2014.

Lost…

Contact with the spacecraft – which works in tandem with a second spacecraft STEREO-A to study the sun – was lost during a test of one of its timers.

Scientists had been testing the timer when STEREO-B’s line of sight and communication to Earth was blocked by the sun.

Meanwhile STEREO-A was unaffected by testing, and continued working normally over the past 22 months.

…and found

STEREO-B was recovered using NASA’s Deep Space Network – an array of giant radio antennas that tracks interplanetary missions.

The positions of STEREO-A, shown in red, and STEREO-B, shown in blue.
Courtesy NASA
The positions of STEREO-A, shown in red, and STEREO-B, shown in blue.

Now contact has been reestablished, the STEREO team will continue monitoring the spacecraft to see what kind of state it’s in.

What is the STEREO mission?

Launched in October 2006, the STEREO mission includes two spacecraft – one ahead of Earth in its orbit, the other behind – tasked with monitoring the flow of energy and matter from the sun to Earth.

READ: Hate your job? NASA wants you to work on Mars

The spacecrafts have already successfully revealed the structure of coronal mass ejections, which are eruptions of matter from the sun so powerful they can disrupt satellites.