The newfound exoplanet, called Kepler-139f, is a gigantic world roughly twice the mass of Neptune and 35 times the mass of ...

Using the James Webb Space Telescope, astronomers have made the shock discovery that giant rogue exoplanets can grow their ...

Astronomers have long struggled to find young planets hidden inside the thick clouds of gas and dust that swirl around new ...

Astronomers have long speculated about the existence of a mysterious planet lurking far beyond Neptune, a world several times ...

University of Arizona. "Why giant planets might form faster than we thought." ScienceDaily. ScienceDaily, 14 June 2025. <www.sciencedaily.com / releases / 2025 / 06 / 250614034242.htm>.

Between the four terrestrial planets–Mercury, Venus, Earth, and Mars–and the distant ice giants of Neptune and Uranus, sit two gas giants: Saturn and Jupiter.

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds silently loop around their stars. Some drift as far as 10,000 times the ...

The planet, TOI-6894b, is about the size of Saturn but orbits a star just a fifth the mass of our Sun. This challenges long-standing ideas about how big planets form, especially around small stars.

The host star is the smallest known to have a transiting giant planet and is about 60% the size of the next smallest star with such a planet. “Most stars in our Galaxy are actually small stars exactly ...

A giant gas planet comparable in size to Saturn exists around a small red dwarf star. The discovery is beyond the scope of conventional astronomy theory, and is making experts reconsider ...

The giant planets in the team's recent study all orbit fairly close to their host stars; some zip around their stars once every few days, while others take up to three Earth years to make a full ...

When the Sun runs out of hydrogen fuel and expands into a red giant, it will eventually encompass the innermost planets of the solar system, out to about Earth’s orbit. Being closer to our ...