A rocky exoplanet GJ 1132 b, similar in size and density to Earth, possesses a hazy atmosphere made up of volcanic gases. Scientists say GJ 1132 b, orbiting a red-dwarf star about 41 light-years aw...

Video of the LBTI instrument's view of the sky.

This chart compares the smallest known exoplanets, or planets orbiting outside the solar system, to our own planets Mars and Earth.

Video of the Kepler spacecraft launch from March 2009.

Audience: 5th grade and older Observed exoplanets are very hot, so much so that many common metals would melt.

This artist's concept shows planet KELT-9b orbiting its host star, KELT-9. It is the hottest gas giant planet discovered so far.

First we learned the Earth was round. Then we found out we were not at the center of the cosmos, just another planet orbiting the sun...

What tones will you pick to color Kepler-186f? Grab crayons, markers, paint or colored pencils and color in the coloring page based on our popular Exoplanet Travel Bureau poster for the planet with...

A transmission spectrum made from a single observation from the Webb Space Telescope reveals atmospheric characteristics of the hot gas giant exoplanet WASP-96 b. 

Kepler-10b must be a scorched world, orbiting at a distance that's more than 20 times closer to its star than Mercury is to our own Sun, with a daytime temperature expected to be more than 2,500 de...

Animation of HAT-P-7 light curve showing both large transit dip and small occultation dip.

This artist's concept shows the closest known planetary system to our own-Epsilon Eridani. Observations from NASA's Spitzer Space Telescope show that the system hosts two asteroid belts, in additio...

Researchers have detected the first "exomoon" candidate -- a moon orbiting a planet that lies outside our solar system. Using a technique called "microlensing," they observed what could be either a...

This diagram compares the planets of our inner solar system to Kepler-186, a five-planet star system about 500 light-years from Earth in the constellation Cygnus. The five planets of Kepler-186 orb...

This artist's conception compares the KOI-961 planetary system to Jupiter and the largest four of its many moons. Image credit: Caltech

Something strange and mysterious creeps throughout the cosmos. Scientists call it dark matter.

Audience: 3rd grade and older This slides shows that some exoplanets are in the so-called "habitable zone."

Kepler-10b as a scorched world, orbiting at a distance that’s more than 20 times closer to its star than Mercury is to our own Sun.

At only four light-years away, Proxima b is our closest known exoplanet neighbor.

NASA's Kepler mission revealed that there are more planets than stars in our galaxy. It opened our eyes to diverse worlds – some entirely unlike planets found in our solar system.

Artist's impression of a transiting Jupiter-mass exoplanet around a star slightly more massive than the Sun, such as the one discovered around SWEEPS-04.

Kepler is launched at night (10:48 PM EST) on a Delta 2 expendable launch vehicle.

For the first time since exoplanets, or planets around stars other than the sun, were discovered almost 20 years ago, X-ray observations have detected an exoplanet passing in front of its parent st...

A detailed explanation into the workings of the coronagraph and how it can help directly image exoplanets.

Astronomers were elated to find clear skies on a Neptune-size planet called HAT-P-11b, as illustrated here. Without clouds to block their view, they were able to identify water vapor molecules in t...