Posts by 

Deborah Byrd

Hello, Mercury! BepiColombo speeds by

Hello, Mercury! BepiColombo is a Mercury mission, due to arrive in earnest in December, 2025. Along the way, it needs help to get there.

Earth is dimming due to climate change

Scientists used measurements of earthshine, plus satellite data, to learn that Earth is dimming due to the warming oceans.

23 species proposed for delisting, now extinct

On September 21, 2021, another 23 species proposed for delisting by U.S. Fish and Wildlife. One is the beloved Ivory-billed Woodpecker.

Einstein’s most famous equation: E=mc2

Einstein's most famous equation describing the relationship of energy and mass, E=mc2, first appeared in a scientific journal on September 27, 1905.

Saturn from Earth, 2004 to 2015

As we view Saturn from Earth over years, our perspective changes. Sometimes see the north face of the rings, and sometimes the south face.

2021’s Harvest Moon: Favorite photos

Photos of 2021's Harvest Moon from the EarthSky Community. Our thanks to all who contributed! Check out community page for more.

Asteroid 2021 SG came from the sun’s direction

Asteroid 2021 SG - 4 times the diameter of 2013's Chelyabinsk meteor - passed near Earth without being previously detected on September 16, 2021.

Rerun of a supernova blast expected 2037

Astronomers expect to see a rerun of a supernova blast, whose light traveled 10 billion years to reach us, in about the year 2037.

Wildfire threatens a SETI telescope in California

Wildfire threatens a SETI telescope. The Allen Telescope Array in California was built specifically for SETI. Scientists and engineers evacuated.

A new coral reef atlas you can explore

A new coral reef atlas is the first global, high-resolution map of its kind. It presents details on the composition and structure of the ocean floor.