Astronomers have discovered an ultracool dwarf binary system - 2 very low-mass stars orbiting closely - completing an orbit in less than an earthly day.

EarthSky Voices

January 11, 2023

Black holes are time machines, with a catch

Black holes are time machines for traveling into the future and the past. But it's not quite so simple. Read more about the rules of time travel in black holes.

EarthSky Voices

January 5, 2023

Isaac Newton born today in 1643

Isaac Newton, born on January 4, 1643, discovered the laws of motion and other principles that laid the foundation of physics and astronomy.

Deborah Byrd

EarthSky Voices

January 4, 2023

Winter wonderland on Mars

NASA captured fascinating images of the winter wonderland on Mars. When Mars thaws in the spring, the ice takes on new shapes and results in erupting geysers.

EarthSky Voices

January 3, 2023

Celestial fireworks from supernova explosion

A new Hubble image shows celestial fireworks from supernova remnant DEM L 190. The supernova remnant resembles the smoke and streamers of summer fireworks.

EarthSky Voices

December 30, 2022

InSight falls silent, NASA declares mission end

NASA’s InSight falls silent and then failed to communicate. So, NASA declared the InSight mission over. InSight revealed secrets about the interior of Mars.

EarthSky Voices

December 23, 2022

A wreath of star formation in Pegasus

The Webb Space Telescope captured the spiral galaxy NGC 7469 in Pegasus and its wreath of star formation in the ring around the galaxy's central black hole.

EarthSky Voices

December 23, 2022