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October birthstone: Colorful opal and tourmaline
Take your pick: the October birthstone is either the striking iridescent opal or the many-colored tourmaline. Learn the lore of these pretty gemstones here.
October 2, 2026
Is there enough water on the moon for future cities?
Is there enough water on the moon for future cities? New estimates say there could be enough for smaller villages or towns, but not larger metropolises.
September 25, 2026
Neptune discovered on this date 180 years ago
Read the fascinating story of the discovery of Neptune - 180 years ago - on September 23, 1846. It was the 1st planet to be discovered by using mathematics.
September 23, 2026
6th batch of Pentagon UAP files: Air Force talk and more
The 6th batch of the Pentagon UAP files has just been released. Read about a U.S. Air Force talk on UAP from 1952, see more videos and more.
September 20, 2026
How many stars can you see on a moonless night?
Have you ever wondered how many stars are visible on a given night? It depends on factors including how dark your sky is and what your age is.
September 9, 2026
Labor Day: Learn its history and traditions
Labor Day is a federal US holiday that falls on the 1st Monday in September and is considered the unofficial end of summer.
September 6, 2026
If we find life beyond Earth, how will nations respond?
If we ever find life beyond Earth, how will the nations of the world respond? A group of experts give 3 possibilities: cooperation, competition and isolation.
September 6, 2026
Sapphire: September birthstone comes in many colors
Sapphire, the September birthstone, is typically blue, the color caused by small amounts of titanium and iron in the crystal structure.
September 1, 2026
Best eclipse photos! Nearly total, August 27-28
EarthSky community photos of the lunar eclipse of August 27-28, 2026. Thanks to all who submitted eclipse photos!
August 28, 2026
Nepal flash flood nightmare: What caused it?
On August 26, 2026, a glacier collapse and landslide triggered a huge release of water. The Nepal flash flood wiped out villages and took untold lives.
August 27, 2026
