A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on?

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

When you look at the solar system, you might notice that the planets' orbits are tilted, and oddities in the protoplanetary ...

One of the most notable properties of the giant planets in our solar system—Jupiter, Saturn, Uranus and Neptune—are the ...

“Overall, our findings challenge the conventional classification of Uranus and Neptune as ’ice giants’ and underscore the ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

Astronomers are investigating a strange class of exoplanets known as eccentric warm Jupiters — massive gas giants that orbit their stars in unexpected, elongated paths. Unlike their close-orbiting ...

From lava worlds to gas giants, NASA says the variety of these worlds is staggering—and that signs of a further 8,000 distant ...

We actually know very little about what's going on inside Uranus and Neptune, causing researchers to propose that these ...

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its nebular gas had been consumed—Earth's solar system and its planets looked more ...

Space scientists look back on 30 years of exoplanet discoveries — from rows of massive ‘super-Earths‘ to worlds with ...

The Adirondack Sky Center & Observatory is thrilled to be your guide to the skies. In this column, I’ll be clarifying some of ...