Interstellar object 3I/ATLAS is expected to reach its perihelion, or the closest point to the Sun in its highly eccentric ...

A scientist has recently posited that a mysterious interstellar object, potentially of extraterrestrial origin, appears to be ...

Driving a spacecraft around a planet isn’t anything like driving on a planet. A physicist explains orbital navigation.

Anyone who studies planetary formation would relish the opportunity to get a close-up look at an interstellar object. Sending a mission to one would undoubtedly yield a scientific payoff. There’s a ...

Behind the Sun, the comet appears to show signs of acceleration beyond what is expected by gravity. And for reasons not yet ...

How do we know the speed of light – and why does it have a speed limit at all? Leah Crane explores the history of one of the ...

Stronger links between researchers who work on Earth’s and other planets’ atmospheres, and between the experimental, ...

NASA's new research reframes orbital debris as a financial risk, quantifying the economic impact of collisions and mission ...

"The implication of alien technology would be huge and therefore we must take it seriously,” Harvard's Avi Loeb told Newsweek ...

"If the object is an alien spacecraft slowing down, and the anti-tail is braking thrust, then this change from anti-tail to ...