A new planet is the first ever discovered that is orbiting a white dwarf and resembles Jupiter in both its mass and its distance from its star.
The James Webb Space Telescope has been in development for so long that space science has changed in the meantime.
New simulations suggest a way to help explain dramatic differences between the sibling worlds.
Simulations suggest that satellite “mega-constellations” will be visible to the naked eye all night long in some locations.
“SN Requiem” should reappear in the 2030s and help determine the universe’s expansion rate.
A century ago, radio astronomy didn’t exist. But since the 1930s, it has uncovered cosmic secrets from planets next door and the faint glow of the universe’s beginnings.
New definitions of “habitable worlds” could include planets with global oceans under a steamy hydrogen atmosphere or exclude ones that started out habitable but lost all their water.
In the 15 years since Pluto lost its planet status, scientists have continued to use the definition that works for them.
The dividing line between successful stars and failed ones is a surface temperature of about 1,200° to 1,400° Celsius, a new study reports.
‘Bright Galaxies, Dark Matter, and Beyond’ tells the story of how astronomer Vera Rubin provided key evidence for the existence of dark matter.