These types of exoplanets are some of the most common in our galaxy - but they've remained mysterious until now.

Astronomer Eliza Kempton said that she had waited her "entire career" to peer into an atmosphere from this mysterious class of planets.

For years, astronomers have toyed with the idea that the Sun hides an extra planet so distant and dim that even the best ...

ALMA observations of carbon monoxide emission from 15 protoplanetary disks reveal a stunning variety of gas structures, ...

Mars is the fourth planet from the Sun and one of our closest neighbors in space. But it’s not a very welcoming place for an ...

Vesta might be a shattered remnant of an early planet, not a failed one—forcing scientists to rethink how worlds begin.

SETI’s senior astronomer explains how colossal artifacts could be the key to finding extraterrestrial life, past or present.

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

An international team used 40 years' worth of data from two space probes to track down what they believe are signs of this ...

Hubble’s 35-year journey showcases humanity’s boldest space achievements, capturing everything from new stars forming to ...

Scientists have found what they are calling the strongest sign yet of possible life beyond our solar system after detecting the chemical footprint of gases in an alien planet's atmosphere that on ...

In celebration of the Hubble Space Telescope's 35 years in Earth orbit, NASA is releasing an assortment of compelling images ...