This 1st quarter moon will offer gorgeous telescopic views for those taking part in Astronomy Day. Then it’ll conveniently set, leaving the sky dark for this weekend’s Lyrid meteors.
Elizabeth Worthy Clark caught the first quarter moon as it was setting on February 23.
It was thought Mars’ 2 small moons – Phobos and Deimos – might be captured asteroids. But new work suggests a violent birth for the moons during a colossal impact.
Simulated view of a small body ramming into Mars, kicking up debris that eventually formed its 2 small moons. Image via Robin Canup/SWRI.
“It’s the beginning of a new era of exoplanet research.”
Humans have been speculating about their existence for thousands of years, but ours is the 1st generation to know, with certainty, that exoplanets are really out there.
This rocky super-Earth is an illustration of the type of planets future telescopes, like TESS and James Webb, hope to find outside our solar system. Image via ESO/M. Kornmesser
Wonderful photos from the EarthSky community of the moon’s sweep this week past the brightest planet, Venus.
Steve Browne wrote, "Peek-a-boo, I see you. The moon and Venus hiding in the trees." Morehead City, North Carolina, April 17, 2018.
How do we know earlier industrial civilizations on Earth didn’t rise and fall long before humans appeared? That’s the question posed in a new scientific thought experiment.
To the eye alone, a supermoon might not look any larger than an ordinary full moon (although your eye might detect the moon looks brighter). But Earth's oceans feel the gravity of the extra-close supermoon, which causes particularly high and low tides. James Younger wrote: "I held a 0.0-meter low tide supermoon photography event at Island View beach, Vancouver Island, B.C. and took a photo of a few people."
Last month wasn’t as hot as March 2016 or March 2017, but it’s in the warmest 6 since modern record-keeping began in 1880.
A global map of the March 2018 LOTI (land-ocean temperature index) anomaly, relative to the 1951-1980 March average. Image via NASA.
For weeks, people have searched for this post more than any other at EarthSky. No, there won’t be a green moon on April 20, 2018. It’s a joke, y’all, with its roots (ahem) in cannabis culture. :-)
Our sun’s sibling stars could be scattered across the sky. Astronomers are sifting through newly released data in the GALAH Survey – a galactic archaeology survey – hoping to find them.
The sun today, April 17, 2018, via NASA SDO.