Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.
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.
For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.
Circular landforms speckling the Venusian surface may be the work of tectonic activity.
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.
