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Halloween ghost of the summer sun
At mid-northern latitudes, the star Arcturus sets about 2 hours after sunset around Halloween. It sets at the same point on the horizon as the summer sun. It's a Halloween ghost of the summer sun and an echo of long summer afternoons.
October 29, 2020
Photos of fiery Mars, at its best in 2020
Photos from the EarthSky community of the bright planet Mars, at its best. Earth passed between Mars and the sun - bringing the planet to a once-in-two-years opposition - on October 13, 2020.
October 13, 2020
What is interstellar space?
Interstellar space isn't just vacuum. It's full of gases, elements, and dust - very thinly spread, to be sure - but the building blocks of stars and planets.
October 10, 2020
Bright fireball widely seen over northeastern Mexico
A fireball is an especially bright meteor from space. It can start out icy and burn up entirely in our atmosphere, or rocky ... in which case a meteorite sometimes falls to Earth's surface. This bright fireball blazed over northeastern Mexico on Tuesday, October 6, 2020.
October 8, 2020
The cycle of close and far Martian oppositions
Like so much in the sky, very close approaches of Mars happen in cycles. Become a Mars guru, here.
October 6, 2020
Favorite photos of 2020’s Harvest Moon
Every year at this time, people in the Northern Hemisphere witness the legendary Harvest Moon. This year, the Harvest Moon was near fiery Mars! Photos here from the EarthSky Community.
October 2, 2020
Spectacular Venus-Regulus conjunction in early October!
Brilliant Venus, in and of itself, is worth getting up for, but the tantalizingly close encounter of Venus with the bright star Regulus won't happen again for another 8 years. Start watching them now!
September 28, 2020
2020 is your year to see Capricornus
Poor Capricornus. The early Greek stargazers labeled it as a Sea Goat, but no amount of squinting - or even imagining - can help you see a Goat in this part of the sky. In 2020, Jupiter and Saturn come to the rescue!
September 9, 2020
Photos of the moon’s sweep past bright Mars
Earth will pass between Mars and the sun in October 2020, and the distance between our 2 worlds is now relatively small. And so Mars is very bright now! Thanks to all in the EarthSky Community who captured Mars near the moon this past weekend.
September 7, 2020
