But NASA's oldest serving astronaut Don Pettit became a septuagenarian while hurtling toward Earth in a spacecraft to wrap up ...

Earth Day — an annual holiday celebrating the planet and promoting climate action — turns 55 years old on Tuesday, April 22. Similar to the first Earth Day in 1970, a wave of protests took place ...

A new study shows TOI-270 d is a fiery rocky exoplanet, offering fresh insight into the galaxy’s most common planet type.

America's oldest serving astronaut Dan Pettit has returned to Earth on his 70th birthday. The Soyuz MS-26 spacecraft carrying ...

Don Pettit's birthday "party" brought together Russian recovery teams in Kazakhstan, where it was April 20 (his birthdate).

NASA astronaut Don Pettit will return to Earth from the International Space Station Saturday, alongside his two Russian ...

A slowly spinning universe could resolve a puzzle in physics known as the Hubble tension, a new model suggests.

The exoplanet K2-18b could harbor a massive ocean, but scientists will need to study the planet more to see if it’s really ...

One of the first major meteor showers of the year will coincide with Earth Day this year, offering a heavenly experience for ...

NASA's Curiosity rover landed on Mars on Aug. 5, 2012, and has travelled more than 34 kilometres on the Martian surface. The discovery of carbonate suggests that the atmosphere contained enough carbon ...

The 83-year-old lifestyle guru posted a throwback Thursday reminding her fans of the time she experienced weightlessness on a ...

Scientists say they have found the strongest evidence yet of life on another planet beyond Earth's solar system. They made the discovery using the James Webb Space Telescope.