211,914 subscribers and counting ...
In Chinese thought, summer has been associated with the color red, the sound of laughing, the heart organ, the fire element and a red phoenix bird.
On the June solstice, the sun sets at the same time in New York City and St. Augustine, Florida. But New York has an hour more of daylight. How’s that happen?
People at high latitudes are seeing glowing clouds in a dark night sky. They’re called noctilucent or “night-shining” clouds.
Confirmation that Mars came out of its last ice age 400,000 years ago. Plus insights into the water cycle on Mars, a possible help to future space colonists.
A rare combination of light and shade over a hillside in Mutare.
An oddly textured region of southern Mars is not ice-covered today. Yet landforms here – and now certain minerals – are associated with under-ice volcanoes.
Earlier this year, scientists presented evidence for a Planet Nine in the far outer solar system. Scientists think it exists, but – if so – how did it get there?
On May 6, 1968 – more than a year before his famous first moonwalk – Neil Armstrong narrowly escaped disaster while training in the Lunar Landing Research Vehicle.
The Eta Aquarid meteor shower was spawned by the famous Comet Halley. But Halley spawned another meteor shower, too.
We knew that Saturn’s moon Titan had seas and lakes of liquid hydrocarbons, but their exact composition was unknown until recently.
Although the lunar month has a mean period of 29 days 12 hours and 44 minutes, the actual length varies throughout the year. Lengths of lunar months in 2016.
They’re calling it a Manx comet, after the cats with no tails. It may have formed in the inner solar system and been ejected outward.
A month by month listing of major moon phases, conjunctions, oppositions, meteor showers and other important dates, from astronomer Fred Espenak.
Breakthrough Starshot seeks proof of concept for a 100-million-mile-per-hour mission – using light-propelled nanocrafts – to reach the nearest star in 20 years.
Read about star travel via conventional propulsion, warp drives, and more.
Visualize a vast reservoir of icy comets on the outskirts of our solar system. That’s what Jan Oort did in 1950, and why the Oort Cloud bears his name.
Red rainbows happen when the sun is on the horizon. They’re created in much the same process that causes a sunset or sunrise to look red.
This Hubble Space Telescope image reveals the first moon ever discovered around little Makemake, in the outermost region of our solar system.
Results from the Venus Express spacecraft, obtained when – in the craft’s final months – it surfed the dense atmosphere of Venus.
Iron-60 found in moon rocks supports an earlier finding that – 2 million years ago – a supernova exploded only 300 light-years away.
Iridescent cloud over Kentucky
Altair your guide to small constellations