"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today." ...

It sold for more than the maximum estimated price of $4 million. On Wednesday (July 16), the largest Mars meteorite on Earth was auctioned off at Sotheby's in New York City for $4.3 million.

Astrophotographer Greg Meyer has captured a spectacular image of the Fireworks Galaxy (NGC 6946) shining close to the dark shape of the Seahorse Nebula.

Revenge of the Savage Planet game director Alex Hutchinson talks strange new worlds and mocking corporate spaceflight.

"The biggest surprise of all was that the black hole was not located inside either of the two nuclei but in the middle. We asked ourselves: How can we make sense of this?" ...

"The existence of any vesicles on Titan would demonstrate an increase in order and complexity, which are conditions necessary ...

"For the first time, we have identified the earliest moment when planet formation is initiated around a star other than our sun." ...

Chang'e 6's samples from the lunar far side contain a record of ancient volcanism, magnetism and a mantle depleted in important elements and water.

"One day soon we may be able to see these 'missing' galaxies, which would be hugely exciting and could tell us more about how the universe came to be as we see it today." ...

SpaceX launched the third batch of satellites for Amazon's Project Kuiper broadband megaconstellation early on Wednesday morning (July 16). A Falcon 9 rocket topped with 24 Kuiper craft lifted off ...

"Our work is a new piece of evidence that suggests that Mars was once a much more complex and active planet than it is now." ...

This Mars rock is up for auction at Sotheby's in New York City this week, which is why it's currently on display in the Upper ...