The Kepler telescope has so far identified more than 2,300 confirmed exoplanets since beginning operations in 2009.
The announcement will come two months after Donald Trump signed a new space policy directive instructing Nasa to return to the moon.
Spacewalking Nasa astronauts gave a hand to the International Space Station's big robot arm as the US federal government geared back up into action.
"While we think we know how planets form in a big-picture sense, there's still a lot of detail we need to fill in," says Kevin Schlaufman.
Russian cosmonaut Anton Shkaplerov rode the vacuum cleaner during routine clean-up activity on the space station.
The finding comes as Nasa continues to prepare for missions to Mars and beyond.
The Juno mission began in August 2011 as part of Nasa's New Frontiers Program. It arrived at Jupiter by July 2016 and the initial mission is to have it orbit the planet 12 times.
Going by its composition, researchers believe that the water on angrites and water on Earth came from the same source.
A fission reactor literally splits atoms to generate power and Nasa has completed initial testing in a vacuum environment.
From potentially hazardous asteroids to Saturn's moon Titan's incredible similarities to Earth – these are the best space stories of the week.
The afterglow from the massive collision has continued to brighten up since August 2017.
Current instruments designed to search for alien life tend to be relatively large, heavy and power-hungry. In addition, they can only detect indirect biological signatures.
A new study based on data from the Cassini spacecraft reveals that Titan's seas lie at an average elevation, like Earth's oceans.
Space junk is a serious enough issue for spacefaring countries to want to look for unconventional methods to clean it up.
In two weeks' time, a kilometre-wide space rock will skim past the Earth at speeds of around 67,000mph.
The star was found being "flung backwards and forwards" at several hundred thousand kilometer per hour speed, every 167 days.
The closely-packed group of galaxies is located some 9.7 billion light years away from Earth.
Gamma ray bursts are very challenging to study as they originate in far flung galaxies and last for short periods of time.
The laser beams, emitted for a few minutes, would be enough to zap the junk into smaller, less harmful pieces.
China claims that the space station will crash in a deep-sea area in the South Pacific known as the "spacecraft cemetery".