Ever since the first direct detection of gravitational waves in 2015 by LIGO, binary…
We normally think of galaxies as falling into two main morphological types, spiral and elliptical. Spiral galaxies have spiral arms, which wind about a central nucleus, all embedded in a halo containing stars, globular clusters, and dark matter. Elliptical galaxies are…
The centers of galaxies are often extremely turbulent places. They usually contain supermassive black holes — weighing…
Throughout history, supernovae have been noticed for their sudden appearances and disappearances. Chinese astronomers in the second century were the first to call them “guest stars”, because they stayed visible in the sky for months, slowly fading to become too dim for…
These were the top 10 stories published by Look Upwards in 2018. You can also dive into monthly archives for 2018 by using the calendar at the top of this page.