Posts by 

Theresa Wiegert

Milky Way mosaic took 12 years, 1250 hours

Through 12 years of photographing and stitching together individual astrophotography images, Finnish astrophotographer J-P Mestavainio has created a 1.7 gigapixel panorama of our Milky Way galaxy.

A supermassive black hole on the move

Astronomers have discovered a restless supermassive black hole that's moving within its galaxy.

Olympus Mons volcano on Mars, from UAE’s Hope

United Arab Emirates' Hope spacecraft has begun producing images of Mars's surface, including a view of Olympus Mons, highest volcano in the solar system.

Highest-energy cosmic rays originate in star clusters, not supernovae

New research solves a decades-long riddle: from where do the highest-energy cosmic rays originate? Even supernovae - exploding stars - can't explain them. Now it seems these sorts of cosmic rays may come from clusters of young, hot, massive stars.

New images from China’s Tianwen-1 at Mars

The Tianwen-1 mission entered Mars orbit at the end of February. It's expected to land a rover on Mars' surface in May. In the meantime, check out these new images from the Tianwen-1 orbiter.

The sounds of space images

Via sonification, you can listen to the sounds of space images, as observed at different frequencies. Listen to videos featuring some of these orchestral pieces here!

Cosmic ray originated in cataclysmic event

Astronomers found a high energy neutrino - a cosmic ray - that apparently originated during a "tidal disruption event," that is, when a supermassive black hole shredded a distant star.

Why does this galaxy look older than its years?

To the extent that we can see them, galaxies in the very early universe should look relatively young and unformed. But galaxy ALESS 073.1 is a surprise to astronomers: it looks more mature than we'd have any reason to expect. Why?

Galaxies have magnetic fields, too! Images here

Until recently, magnetic fields in the outskirts of galaxies were too faint to be detected. Although it's still not clear what causes them or how they're maintained, astronomers have started to create images of their observations of galaxies' magnetic fields producing beautiful aurora-like effects. See them here.

Both Hope and Tianwen-1 now orbiting Mars

The Chinese Tianwen-1 mission to Mars successfully entered Mars orbit on February 10, 2021, only one day after the United Arab Emirates mission Hope arrived at the red planet on February 9. They'll be followed soon by NASA's Perseverance mission which is set to arrive and land on February 18.