NASA astronaut Scott Kelly has spent more than 200 days in space.
The images of Earth are captured by a camera 1 million miles away.
Space travel today is just too slow, so one rocket scientist is developing technology that could send humans to Mars in a matter of weeks.
Nearly 400 major cities in the U.S., including Florida, Now Orleans and Miami, are under serious threat due to a drastic change in the sea levels.
Although Mars today exists as a cold and arid planet, pebbles recovered from its surface suggest that the situation may have been much different nearly three billion years ago.
NASA and Israel have previously conducted several joint experiments in the field of climate and microgravity research.
Sending humans to the red planet would involve crossing three "thresholds," the space agency said, in a new report. NASA aims to establish "Earth independent" habitats on Mars as early as the 2030s.
Particles in Pluto's hazy atmosphere scatter light to make it appear blue.
A design for a 3D-printed pressurized shell of multi-layered ice -- named the "Mars Ice House" -- has won the top prize in NASA's Mars Habitat contest.
The latest set of photos from the spacecraft show a complex surface shaped by a violent history, and covered in mountains, canyons and craters.
Europa is one of the four largest moons hovering near Jupiter and is inundated with radiation from the giant gas planet.
The surface feature, containing several snakeskin-like structures, has been informally named "Tartarus Dorsa," after a region of the underworld in Greek mythology.
"The evidence says no one's out there," said world-renowned NASA scientist William Borucki.
A latest research has claimed that the Earth continues to have an influence on the size of the moon.
Saturn's moon Enceladus has a huge global ocean below it's ice-encrusted surface, according to scientists at NASA.
"If an artist had painted this Pluto before our flyby, I probably would have called it over the top," New Horizons Principal Investigator Alan Stern said in a statement released Thursday.
After completing a historic flyby of the dwarf planet Pluto last month, the New Horizons spacecraft is now headed to the dark and icy Kuiper Belt.
Each participant will have a small room containing a sleeping cot and desk.
American astronauts drink recycled urine while aboard the International Space Station, but the Russian crews, who also inhabit the station, do not.
Public interest in the Pluto fly-by earlier this year has NASA mulling new plans.
It was a static fire test mimicking an actual launch, firing 512,000 pounds of thrust for 535 seconds.
The incoming ozone pollution from China is hindering the attempts the country has been making to cut ozone emissions in recent years.