Sign Up for Our Amazing Newsletter!
A daily update by email. Science news, great photos, sky alerts.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Posts by
Theresa Wiegert
The most ancient spiral galaxy yet
Astronomers have discovered a spiral galaxy surprisingly near the beginning of the universe, making it the most ancient spiral galaxy found so far.
June 3, 2021
Alien stars found in our Milky Way
Astronomers precisely measured the ages of 100 red giant stars. Many are alien stars from another galaxy, which merged with ours 10 billion years ago.
May 25, 2021
Sharks navigate using Earth’s magnetic field
Longstanding mystery solved! New research shows that - just as lobsters, turtles and some birds do - sharks navigate using Earth's magnetic field,
May 13, 2021
Cool sun image
EarthSky readers submit wonderful photos to us every day. This week we received this interesting composite image of the sun, our nearest star.
May 12, 2021
Map of Milky Way halo reveals dark matter ocean
The gravity of the Large Magellanic Cloud - one of the Milky Way's satellite dwarf galaxies - is collecting stars behind it in a trail, like the wake from a boat, as it travels through our galaxy's halo.
May 5, 2021
Going up and coming down this week
Within hours of each other, one rocket left the Earth on April 28, 2021, and one cargo space ship returned on April 29 - via a planned destruction during re-entry - after having been attached to the International Space Station for a year.
April 30, 2021
Radio waves from famous FRB surprisingly long and late
Astronomers have managed to detect very long wavelength radio emission from a well-studied, repeating fast radio burst, called FRB 20180916B. What's more, the longer wavelengths arrive 3 days after the shorter wavelength counterpart of the signal! Why?
April 28, 2021
Chemical fingerprint reveals a migrating exoplanet
The chemical fingerprint of exoplanet HD 209458b's atmosphere reveals as many as 6 molecules and that it has migrated inwards from its birthplace much farther out in its star system.
April 14, 2021
The closest extragalactic fast radio burst yet?
Astronomers detected a new, nearby, repeating fast radio burst, originating from a spot near the great spiral galaxy M81.
April 8, 2021
Hummingbird having a spring meal
Hummingbirds can fly up to 20 miles (32 km) in a day and are now traveling north, some all the way from Central America to Canada and even Alaska. This beautiful hummingbird was captured feeding from blossoms in California this week.
April 2, 2021
