The Kepler mission has discovered 1,284 new planets. Of these newly discovered planets, nine orbit in the habitable zone of their star and nearly 550 are possibly rocky planets roughly around the same size as Earth.
The Kepler mission has discovered 1,284 new planets. Of these newly discovered planets, nine orbit in the habitable zone of their star and nearly 550 are possibly rocky planets roughly around the same size as Earth.
Nasa/W. Stenzel
This artist's impression shows an imagined view from the surface one of the three planets orbiting an ultracool dwarf star just 40 light-years from Earth that were discovered using the TRAPPIST telescope at ESO's La Silla Observatory. Given the proximity of the dwarf star, the rosy sun would appear very large in the sky.
This artist's impression shows an imagined view from the surface one of the three planets orbiting an ultracool dwarf star just 40 light-years from Earth that were discovered using the TRAPPIST telescope at ESO's La Silla Observatory. Given the proximity of the dwarf star, the rosy sun would appear very large in the sky.
M. Kornmesser/ESO
On Thursday, July 23, NASA announced the discovery of Kepler-452b, "Earth's bigger, older cousin." This artistic concept shows what the planet might look like. Scientists can't tell yet whether Kepler-452b has oceans and continents like Earth.
On Thursday, July 23, NASA announced the discovery of Kepler-452b, "Earth's bigger, older cousin." This artistic concept shows what the planet might look like. Scientists can't tell yet whether Kepler-452b has oceans and continents like Earth.
NASA
Kepler-452b is about 60% larger than Earth, left. It's about 1,400 light-years from Earth in the constellation Cygnus.
Kepler-452b is about 60% larger than Earth, left. It's about 1,400 light-years from Earth in the constellation Cygnus.
NASA
A team of astronomers announced April 17, 2014, that they discovered the first Earth-size planet orbiting a star in the "habitable zone": the distance from a star where liquid water might pool on the surface. That doesn't mean this planet has life on it, says Thomas Barclay, a scientist at the Bay Area Environmental Research Institute at Ames and a co-author of a paper on the planet, called Kepler-186f. He says the planet can be thought of as an "Earth-cousin rather than an Earth-twin. It has many properties that resemble Earth." The planet was discovered by NASA's Kepler Space Telescope. It's about 500 light-years from Earth in the constellation Cygnus. The picture above is an artist's concept of what it might look like.
A team of astronomers announced April 17, 2014, that they discovered the first Earth-size planet orbiting a star in the "habitable zone": the distance from a star where liquid water might pool on the surface. That doesn't mean this planet has life on it, says Thomas Barclay, a scientist at the Bay Area Environmental Research Institute at Ames and a co-author of a paper on the planet, called Kepler-186f. He says the planet can be thought of as an "Earth-cousin rather than an Earth-twin. It has many properties that resemble Earth." The planet was discovered by NASA's Kepler Space Telescope. It's about 500 light-years from Earth in the constellation Cygnus. The picture above is an artist's concept of what it might look like.
NASA Ames/SETI Institute/JPL-Caltech
Scientists announced in June 2013 that three planets orbiting star Gliese 667C could be habitable. This is an artist's impression of the view from one of those planets, looking toward the parent star in the center. The other two stars in the system are visible to the right.
Scientists announced in June 2013 that three planets orbiting star Gliese 667C could be habitable. This is an artist's impression of the view from one of those planets, looking toward the parent star in the center. The other two stars in the system are visible to the right.
ESO/M. Kornmesser
This diagram shows the planets thought to orbit star Gliese 667C, where c, f and e appear to be capable of having liquid water. The relative sizes, but not relative separations, are shown to scale.
This diagram shows the planets thought to orbit star Gliese 667C, where c, f and e appear to be capable of having liquid water. The relative sizes, but not relative separations, are shown to scale.
ESO
This diagram lines up planets recently discovered by Kepler in terms of their sizes, compared with Earth. Kepler-22b was announced in December 2011; the three Super-Earths were announced April 18, 2013. All of them could potentially host life, but we do not know anything definitive about their compositions or atmosphere.
This diagram lines up planets recently discovered by Kepler in terms of their sizes, compared with Earth. Kepler-22b was announced in December 2011; the three Super-Earths were announced April 18, 2013. All of them could potentially host life, but we do not know anything definitive about their compositions or atmosphere.
NASA/Ames/JPL-Caltech
This illustration depicts Kepler-62e, a planet in the habitable zone of a star smaller and cooler than the sun. It is about 1,200 light-years from Earth in the constellation Lyra.
This illustration depicts Kepler-62e, a planet in the habitable zone of a star smaller and cooler than the sun. It is about 1,200 light-years from Earth in the constellation Lyra.
NASA/Ames/JPL-Caltech
This illustration depicts Kepler-62f, a planet in the habitable zone of a star smaller and cooler than the sun, in the same system as Kepler-62e.
This illustration depicts Kepler-62f, a planet in the habitable zone of a star smaller and cooler than the sun, in the same system as Kepler-62e.
NASA/Ames/JPL-Caltech
This diagram compares the planets of our own inner solar system to Kepler-62, a five-planet system about 1,200 light-years from Earth. Kepler-62e and Kepler-62f are thought capable of hosting life.
This diagram compares the planets of our own inner solar system to Kepler-62, a five-planet system about 1,200 light-years from Earth. Kepler-62e and Kepler-62f are thought capable of hosting life.
NASA/Ames/JPL-Caltech
The planet Kepler-69c is about 2,700 light-years from Earth in the constellation Cygnus.
The planet Kepler-69c is about 2,700 light-years from Earth in the constellation Cygnus.
NASA/Ames/JPL-Caltech
This diagram compares the planets of our own inner solar system to Kepler-69, which hosts a planet Kepler-69c that appears to be capable of hosting life, in addition to planet Kepler-69b.
This diagram compares the planets of our own inner solar system to Kepler-69, which hosts a planet Kepler-69c that appears to be capable of hosting life, in addition to planet Kepler-69b.
NASA/Ames/JPL-Caltech
This artist's illustration represents the variety of planets being detected by NASA's Kepler spacecraft.
This artist's illustration represents the variety of planets being detected by NASA's Kepler spacecraft.
C. Pulliam & D. Aguilar (CfA)
Where life might live beyond Earth

Story highlights

Kepler telescope in emergency mode 75 million miles away

"Emergency mode is the lowest operational mode and is fuel intensive," NASA says

CNN  — 

NASA’s Kepler spacecraft is in trouble – far, far away.

The telescope that searches for habitable planets in outer space went into emergency mode 75 million miles away from home, leaving engineers scrambling.

Mission engineers discovered Kepler was in distress during a scheduled contact Thursday. In emergency mode, Kepler burns through its power supply faster, making recovering it a priority.

“Emergency mode is the lowest operational mode and is fuel intensive,” NASA said.

Delayed response

Fixing the telescope is a challenge at such a far distance. Kepler’s signals don’t travel instantaneously, which slows down communication with ground command.

“Even at the speed of light, it takes 13 minutes for a signal to travel to the spacecraft and back,” NASA said.

Earth’s older cousin

Since NASA launched the Kepler telescope in 2009, it’s been one busy spacecraft.

Its goal is to survey the Milky Way to determine how many stars in our galaxy might have habitable planets, according to NASA.

Read: The planet hunter searching for another Earth

So many exoplanets

Exoplanets — or planets orbiting other stars – are a dime a dozen. But Kepler goes the extra mile to determine whether they are habitable.

Just last year, the Kepler mission confirmed a planet in the “habitable zone” around a sun-like star – which NASA referred to as Earth’s older cousin.

Two missions

During its first mission completed in 2012, Kepler detected nearly 5,000 exoplanets. More than 1,000 have been confirmed, according to NASA.

Two years ago, NASA began Kepler’s second mission.

Under this mission, it searches for exoplanets and research opportunities to study young stars and other astronomical objects.

Kepler is not new at this trouble thing. In 2012, it lost one of its four wheels used for balancing the spacecraft.