Nola Taylor Tillman

For the first time, helium has been spotted in the atmosphere of an exoplanet. A new method of probing these atmospheres may make it easier to study more worlds.

A collision between Mars and a large asteroid may have created the planet's two moons, Phobos and Deimos.

The names of explorers and the authors of journeys make up some of the first feature names for Charon.

The slow death of a ring may have built up the distinctive ridges on Saturn's walnut-shaped moon.

Hazes baked in a lab may help researchers to understand the atmosphere of exoplanets.

Researchers may have finally found the ghostly footprint of Jupiter's moon Callisto in the planet's auroras.

Fast and furious cosmic flashes leave scientists flummoxed.

A ghostly galaxy has almost no dark matter.

As a black hole consumes a star, an echoing "burp" reveals insight into the process.

Water may continue to play a vital role on the dwarf planet Ceres.

The intricate threads of cold gas in the Orion Nebula reveal that star formation in the largest clouds works much as it does in the smaller ones, thus unifying theories about how stars are born.

Nancy Grace Roman helped fight for what would become the Hubble Space Telescope. At 92, she continues to encourage women in astronomy today.

A dense star may help solve the mystery of a class of extremely bright objects.

The universe's early gas may have been cooled by interactions with dark matter.

Fears of closure or destruction for the Arecibo Observatory were put to rest with the announcement of a new team of partners.

The solar system's first known visitor is spinning wildly as it zips around the sun.

While current evidence for the Neptune-size exomoon around a Kepler world is tentative, the distant moon seems to defy current moon-formation theories.

A thick, gooey, asphalt-like layer could lie beneath Pluto's crust.