In September 2022, a NASA spacecraft violently smashed into a tiny asteroid as a test of planetary defense. Now, a new probe ...

What would happen if an asteroid struck the Earth? We spoke with a NASA planetary scientist who is working to find out.

The real Solar System is far stranger than the simple school model suggests. NASA probes have revealed diamond rain, ice volcanoes, centuries-long storms, and worlds that behave nothing like planets ...

NASA’s Roman Space Telescope could help researchers explore dark energy, find planets beyond our solar system and map distant ...

October 18, 2026 5:25 pm ET | Get SpacePolicyOnline.com's list of space policy events for the week of October 18-24, 2026 ...

Japan is preparing to investigate one of the solar system’s most intriguing mysteries: the origin of Mars’ two small moons.

The Japan Aerospace Exploration Agency (JAXA) plans to launch its Martian Moons eXploration (MMX) mission today at 3:41 p.m. ET. The first-of-its-kind endeavor will send a spacecraft to survey both of ...

NASA lost contact with its Maven spacecraft – the youngest of its Mars orbiters – at the end of 2025. The others in its fleet ...

Voyage due to launch early Tuesday morning Japan time will be watched for further potential signs of life on red planet ...

A Japanese-led mission is launching to explore Mars’ two mysterious little moons and determine how they formed — and unlock ...

The shape is formed by the remains of a dying star with a very dense stellar core that is shedding its outer layers.

For the first time ever, a spacecraft will travel all the way to the Mars system and return. But first, it has to get through the launch ...