Refined stellar yardstick helps astronomers improve stellar evolution models
When you want to know the size of a room, you use a measuring tape to calculate its dimensions.
But you can’t use a tape measure to cover the inconceivably vast...
Winner Declared in Tug-of-War Between Two Satellite Galaxies of the Milky Way
In a cosmic tug-of-war between two dwarf galaxies orbiting the Milky Way, only NASA’s Hubble Space Telescope can see who’s winning.
Newly discovered, vast, complex dust structure, about 150 billion miles across, envelopes the young star HR 4796A
Finding lots of dust around stars may not sound like anything astronomers would get excited about.
Researchers Surprised by How Much Water Found in Atmosphere of WASP-39b
Using Hubble and Spitzer space telescopes, scientists studied the “hot Saturn” called WASP-39b — a hot, bloated, Saturn-mass exoplanet located about 700 light-y...
New Survey Is the Most Precise Measurement of the Universe's Expansion Rate
The good news: Astronomers have made the most precise measurement to date of the rate at which the universe is expanding since the big bang.
Storms on Neptune Play Peek-A-Boo With Planetary Astronomers
Three billion miles away on the farthest known major planet in our solar system, an ominous, stinky, dark storm is shrinking out of existence as seen in pictures of Neptune taken ...
Worlds in the Star’s Habitable Zone Are Not Smothered Under Primordial Atmospheres
Only 40 light-years away — a stone’s throw on the scale of our galaxy — several Earth-sized planets orbit the red dwarf star TRAPPIST-1.