Magnetic activity on the Sun leads to solar flares, coronal mass ejections, and other space weather that affects Earth. Similar activity on other stars...
New images from the NASA/ESA Hubble Space Telescope of the long-period comet C/2019 Y4 (ATLAS), taken on April 20 and 23, 2020, provide the sharpest views...
Professor Andrew King from the University of Leicester has shown that periodic X-ray eruptions from a galaxy called GSN 069 could result from the core...
Astronomers using the NASA/ESA Hubble Space Telescope have captured a striking new photo of the spiral galaxy NGC 4100.
This Hubble image shows a spiral...
In celebration of the 30th anniversary of the launch of the NASA/ESA Hubble Space Telescope, astronomers used the telescope to take a portrait of the giant...
Using the NASA/ESA Hubble Space Telescope and several ground-based telescopes, astronomers have been able to watch the long-period comet C/2019 Y4 (ATLAS)...
A team of researchers from the U.S. Geological Survey, the Lunar and Planetary Institute and the South Dakota School of Mines and Technology has released...
A new analysis of archival data from NASA’s Mercury Surface, Space Environment, Geochemistry and Ranging (MESSENGER) spacecraft reveals a sudden rise...
The directly-imaged massive exoplanet Fomalhaut b is actually a dispersing cloud of dust, produced by a catastrophic collision between two large planetesimals...
Comets spend most of their lives at large distances from any star, during which time their interior compositions remain relatively unaltered. Cometary...
Astronomers using the NASA/ESA Hubble Space Telescope have obtained a remarkable view of the dwarf galaxy LEDA 29388.
This Hubble image shows the dwarf...
Astronomers using data from NASA’s Kepler Space Telescope have discovered an Earth-sized planet in the habitable zone of a low-mass star called Kepler-1649.
An...
A nova is a sudden, short-lived brightening of an otherwise inconspicuous star. It occurs when a stream of hydrogen from a companion star flows onto the...
The NASA/ESA Hubble Space Telescope has captured a vivid image of a star-forming spiral galaxy called NGC 2906.
This Hubble image shows NGC 2906, a spiral...
Brown dwarfs are cool, dim objects that have a size between that of a gas giant, such as Jupiter or Saturn, and that of a Sun-like star. Sometimes called...
Space-based X-ray observations of hundreds of galaxy clusters suggest that the Universe may be different depending on which way astronomers look. The study...
Astronomers using the 8.2-m Subaru Telescope report the first unambiguous detection of a relativistic jet — a beam of charged particles that travels...
A team of planetary researchers from the United States and the United Kingdom has created a 2D map of densities and temperatures in Saturn’s thermosphere...
The NASA/ESA Hubble Space Telescope has produced an outstanding image of a spiral galaxy called NGC 2273.
This Hubble image shows the spiral galaxy NGC...
