What is a supermoon?

We’re currently enjoying a “season” of 3 full moon supermoons: March 9, April 7-8 and May 7, 2020. Then we’ll have a “season” of 3 new moon supermoons on September 17, October 16 and November 15, 2020. Supermoon-o-mania, here.

Was Mercury once habitable?

As unlikely as it may sound, Mercury may have once been able to support subsurface microscopic life, according to a new study from the Planetary Science Institute.

Ready, set, explore Earth from home

We’re at home. How about you? But we just discovered these virtual tours, galleries and live webcams from around the world, which we wanted to share. Stay home, and have some virtual fun …

April 3 is John Burroughs’ birthday

John Burroughs – born in 1837 – was one of the 1st nature writers. He said: “I go to nature to be soothed and healed, and to have my senses put in order.”

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Photos: Venus and the Pleiades meet

This week, Venus – the brightest planet and dazzling “evening star” – will pass the beautiful Pleiades star cluster, also known as the Seven Sisters. Look west after sunset! Venus and the Pleiades meet only every 8 years. Photos here.

EarthSky’s essential coronavirus links

Updated April 2, 2020. To mask or not to mask, and, if so, how? Plus more evidence – from Iceland this time – that the virus is being spread by people with no symptoms. Ongoing shortages at hospitals and more, mainly from the worlds of science and medicine, about the coronavirus pandemic.

How to model a pandemic

Behind every government announcement, there is an army of epidemiologists predicting how the virus will spread, and how to beat it. Note that this story doesn’t deal specifically with the University of Washington models released yesterday, projecting U.S. infections and deaths from COVID-19 in the coming months. But it does provide insights into how scientists create models.

April 2020 guide to the bright planets

In April 2020, Venus is at its brightest as the evening “star,” passing near the Pleiades, or Seven Sisters, as the month begins. In the morning, you can see Jupiter, Saturn and Mars. In the Southern Hemisphere, catch Mercury before sunrise …

Jupiter gives us Pluto in 2020

Jupiter and Pluto stay close together on the sky’s dome throughout 2020. This year may well present the best Jupiter-Pluto alignment for centuries to come, with the first of the year’s 3 Jupiter-Pluto conjunctions to fall on April 5, 2020.

1st quarter moon is April 1

The 1st quarter moon happens on April 1, 2020, at 10:21 UTC. As viewed from anywhere on Earth, a 1st quarter moon is at its highest in the sky at sunset, looking like half a pie.

April’s birthstone is the diamond

Happy birthday April babies! Your birthstone, the diamond, is the rich cousin of graphite.

What is dark energy?

Dark energy is one of the great unsolved mysteries of cosmology. It’s now thought to make up 68% of everything in the universe.

International team discovers 3 new species of flying reptiles

The new fossil discoveries provide clues about flying, spike-toothed reptiles that lived in the Sahara 100 million years ago.