Finding a Saturn-sized world around the young star TWA 7 could pave the way for the Webb space telescope’s direct observation of other exoplanets.
Simulations show that the star's tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.
A faint yet visible Martian aurora is the first instance of the phenomenon spotted from another planet's surface.
Hubble is still going strong 35 years after it was launched into space. Celebrate its anniversary with some out-of-this-world images.
Some of the unusual rocks carry stories about water on Mars. One has hints of long-gone microbes. All tell of a dynamic, complex planet.
Last year, astronomers announced that a planet orbits Barnard’s star. Now, researchers have confirmed the existence of three more.
Earth’s core could contain helium from the early solar system. The noble gas tucks into gaps in iron crystals under high pressure and temperature.
Uranus radiates more energy than it gets from the sun, two new studies find — just as Jupiter, Saturn and Neptune do.
NASA’s Juno spacecraft identifies over 40 enormous lava lakes on Io, shedding light on the extreme volcanism sculpting Jupiter’s moon.
If successful, Morning Star would be the first private mission to another planet and the first in over 30 years to directly measure Venus’s clouds.
