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Posts by
EarthSky
Hunter’s Moon photos: Best of 2021
As autumn advances in the Northern Hemisphere, the Hunter's Moon illuminates the world for several nights around October 20. Hunter's Moon photos here.
October 20, 2021
How high up are meteors when they begin to glow?
How high up are meteors when they begin to glow? Meteors begin to glow almost as soon as they hit Earth's atmosphere,.
October 20, 2021
Which bird migrates the farthest?
Which bird migrates the farthest? Over its lifetime of about 25 years, an Arctic tern can fly nearly 3 times the distance from the Earth to the moon.
October 17, 2021
October birthstone: opal or tourmaline
Take your pick: the October birthstone is either the striking iridescent opal or the many-colored tourmaline. Learn the lore of these gemstones here.
October 5, 2021
How many stars can you see?
Have you ever wondered how many stars are visible on a given night? It all depends on how dark your sky is, what your age is, and other limiting factors.
September 28, 2021
Cassiopeia the Queen ascends in September and October
Cassiopeia the Queen is an easy-to-find constellation. It has the shape of a W or M. Look in the north-northeast sky on September and October evenings.
September 13, 2021
Here are the 2022 Breakthrough Prize winners
2022 Breakthrough Prize winners made discoveries leading to Covid-19 vaccines, treatments for neurological diseases, and more precise quantum clocks.
September 10, 2021
September birthstone is the sapphire
Sapphire, the September birthstone, is typically blue, the color caused by small amounts of titanium and iron in the crystal structure.
September 7, 2021
Was Comet ATLAS a blast from the past?
Comet ATLAS was seen to break apart in 2020, while still relatively far from the sun. An astronomer thinks our early ancestors saw this comet.
August 25, 2021
Pluto became a dwarf planet on today’s date
Pluto is the largest of many small bodies in the outer solar system. That's partly why it was demoted from major planet to dwarf planet in 2006.
August 24, 2021
