- More evidence for ancient ocean on Mars from Chinese roverby Paul Scott Anderson on November 20, 2024 at 11:33 am
A new analysis of data from China's Zhurong rover supports the existence of an ancient ocean on Mars billions of years ago in the northern hemisphere. The post More evidence for ancient ocean on Mars from Chinese rover first appeared on EarthSky.
- Sun news November 20: Dueling southern prominencesby C. Alex Young on November 20, 2024 at 11:10 am
Sun news November 20, 2024. Solar flare activity drops back to low as two prominences duel near the southern solar pole. Will they erupt? The post Sun news November 20: Dueling southern prominences first appeared on EarthSky.
- How to see Earth’s shadow at sunrise and sunsetby Deborah Byrd on November 20, 2024 at 11:00 am
Just before sunrise and after sunset, you can spot Earth's shadow. Look west at sunrise and east at sunset. Learn more about Earth's shadow here. The post How to see Earth’s shadow at sunrise and sunset first appeared on EarthSky.
- A mystery mollusk sea slug in the deep oceanby Shireen Gonzaga on November 20, 2024 at 9:45 am
After 20 years of research, scientists have identified and named a new species of sea slug that lives in the deep ocean. They called it Bathydevius caudactylus. The post A mystery mollusk sea slug in the deep ocean first appeared on EarthSky.
- Visible planets and night sky guide for Novemberby Marcy Curran on November 20, 2024 at 8:30 am
Visible planets and night sky guide for November 2024. Tonight, look for the moon near Mars, the stars Castor and Pollux, and the Beehive star cluster. The post Visible planets and night sky guide for November first appeared on EarthSky.
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When astronomers compare the brightness of different stars, they use a scale known as absolute magnitude. That’s how bright the stars would look if they were lined up at the same distance: 10 parsecs, which is 32.6 light-years.
One star they’d barely have to nudge is Pollux, the brightest star […] This has been a busy year for the Sun. It’s near the peak of its 11-year magnetic cycle, so it’s produced some big eruptions of energy and charged particles. Some of those outbursts have caused troubles here on Earth. And future storms could cause even bigger troubles, with some cities facing a […] Jupiter is the “big brother” of the solar system in more ways than one. It’s more than twice as massive as all the other planets and moons combined. That makes its gravity especially strong, so it can push around the little guys. What’s more, Jupiter likely is the oldest of the Sun’s […] The bright Moon has some bright companions tonight: the planet Jupiter and the stars Aldebaran and Elnath. But the Moon washes out some fainter lights: the Leonid meteor shower.
The shower is expected to reach its peak late tonight – perhaps 15 or 20 meteors per hour. But only the brightest of […] The first intentional message to other civilizations was beamed into the galaxy 50 years ago tomorrow. There wasn’t much to it – just 1,679 bits of data. When properly decoded, the message yields a picture – stick-figure outlines of a person and the message’s planet of origin, for example. […]