Could a lonely planet wander aimlessly through the restless galaxy change the subtle dance of gravity within our solar system ...

Discover the 9 rarest moons in the solar system, from Saturn’s Titan to Neptune’s Triton. Learn about their unique phases, ...

In our own solar system, there are pretty good odds that you could stand on the surface of an asteroid and not even be able ...

Dwarf planet 2023 KQ14, Ammonite, has a stable orbit that challenges the hypothesis of the mysterious Planet Nine.

"To measure these properties, we should attempt to use all telescopes on Earth and in space." The post Mysterious Object ...

Something strange is moving through our solar system — and scientists are scrambling to figure out exactly what it is.

"This is really like looking at ourselves in a funhouse mirror." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Skewed planetary pathways around ...

A study of the Beta Pictoris Moving Group (BPMG), a cluster of relatively young stars, suggests a high prevalence (20 out of 30 surveyed) of stars possessing Jupiter-mass planets in long-period orbits ...

Scientists have long puzzled over why all of the planets in Earth’s solar system have slightly slanted orbits around the sun. But a new, Yale-led study suggests this phenomenon may not be so unusual ...

Scientists have been trying to find a hypothetical Planet 9 that may exist outside our known solar system based on the unusual orbits of certain dwarf planets. But those orbits might not require a ...

Portal Space Systems says it has successfully tested its solar thermal propulsion system at operational temperatures inside a ...