Our universe is a tapestry of galaxy congregations and vast voids. An international team of astronomers has now published a new study revealing more of this cosmic structure as it appears surrounding our Milky Way.
Analysis of measurements via the Gaia space telescope – of star positions, brightnesses and distances – has let astronomers probe a merger 10 billion years ago between the primitive Milky Way and a dwarf galaxy called Gaia-Enceladus.
Io’s volcanoes have fascinated scientists since the Voyager 1 spacecraft first discovered them nearly 40 years ago. Now a comprehensive new report – based on ground-based studies – unveils new mysteries about the most volcanically active world in our solar system.
Posted by EarthSky in Space | Today's Image|3 weeks ago
Here’s a reconstructed “perspective view” of the tallest mountain on Ceres, which in turn is the largest world in the asteroid belt between Mars and Jupiter. Earthly astronomers call the mountain Ahuna Mons.
This short video, just over a minute long, takes you on a journey from 1991, when no exoplanets were known, to today’s 4,003+ known exoplanets. Why the plus? According to the NASA Exoplanet Archive, the number of known exoplanets has already jumped up to 4,031 and counting!
Astronomers didn’t expect to see a thin disk around the supermassive black hole at the center of galaxy NGC 3147, some 130 million light-years away. They’re using Einstein’s theories of relativity to understand the velocities involved, and the intensity of the black hole’s pull.