The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

The OSIRIS-REx mission returned to the sample to Earth in September of 2023, and these studies show that it contains amino ...

Mars's moon Phobos is so strange that no one knows how it formed. But a forthcoming mission could solve this mystery - and a ...

In October 2020, a van-sized robotic spacecraft briefly touched down on the surface of Bennu, a 525-meter-wide asteroid 320 ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

Asteroids are more than just space rocks—they come in many shapes, sizes, and compositions, with some even defying scientific ...

Gov. Josh Green is calling for a renewed push to expand rooftop solar. HPR's Savannah Harriman-Pote speaks with the head of ...

Simpson and Chen ran mathematical models looking at how differently sized Earth-like worlds would have affected the rest of ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Solar Orbiter has revealed that tiny, hair-like jets in the Sun’s coronal holes are responsible for both fast and slow solar ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

Chemical traces and microbes could break down or transform as they rise, making them unrecognizable by the time they reach ...