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Was ‘Oumuamua an outgassing interstellar comet?
Researchers have solved the mystery of the strange orbit of 'Oumuamua. Outgassing from hydrogen gave the interstellar comet its distinctive push.
March 22, 2023
Is a solar flare the same thing as a CME?
Solar Cycle 25 is fairly active now, and that means more solar activity. So, what's the difference between a solar flare and a coronal mass ejection (CME)?
March 22, 2023
Noctilucent clouds on Mars spotted by Mars Perseverance
The Perseverance rover took this image of noctilucent clouds on Mars on March 18, 2023. These night-shining clouds also appear on Earth.
March 21, 2023
The attitude of the Swan and the Northern Cross
Guy Ottewell answers the question: Since the Northern Cross is vertical as it sets in the west, why is it not also vertical as it rises in the east?
March 17, 2023
What is bioluminescence? It’s a living light
Bioluminescence is living light. From plankton to jellyfish to fireflies, many creatures around the world can glow in the dark. Learn more here.
March 17, 2023
Mount Everest climbers leave their germs behind
Researchers found microbes, including those from humans, within the death zone of Mount Everest. This has implications for our future in space.
March 17, 2023
Asteroid 2023DW won’t hit Earth on Valentine’s Day 2046
Astronomers have now said asteroid 2023DW will most likely not hit Earth on Valentine's Day 2046. In fact, there's a 99.972% chance that 2023DW will miss us.
March 16, 2023
Asteroid 2023 EY to sweep closer than moon tonight
On March 17, 2023, near-Earth asteroid 2023 EY will sweep closely past Earth, coming within about 62% of the moon's distance. You can watch it live here!
March 16, 2023
New NASA moon suit makes its debut
Working with the Houston-based company Axiom Space, NASA unveiled a prototype of the new NASA moon suit on March 15, 2023.
March 16, 2023
How fast is daytime growing? Guy Ottewell explains
How fast is daytime growing? A table in this post shows differences in the time of sunrise as we approach the March equinox.
March 16, 2023
