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.
The roar of motors, ping of military sonar, bangs and blasts from offshore development are distracting, confusing, and even killing, aquatic animals.
Image via Unsplash.
Scientists 1st observed gravitational waves from merging black holes. Now they’re targeting a different gravitational wave signal: a long continuous waveform from a rapidly spinning neutron star.
Artist's concept of gravitational waves via ScienceBlog.
2018 GE3 swept by at half the moon’s distance Sunday, just hours after being detected. Its size is 3 to 6 times that of the space rock that penetrated the skies over Chelyabinsk, Russia, in 2013.
Asteroid 2018 GE3 by Michael Jaeger. Used with permission.
You might see some Lyrids this week. April 22 is the peak morning. Try April 21 and 23 as well. Good news … the moon is out of the way.
Lyrids and others via NASA/MSFC/D. Moser
This week is International Dark Sky Week. Celebrate by watching this impossible, but magical, video of dark, starry skies over light-polluted New York City. It’s new from Project Skyglow.