Posts by 

Deborah Byrd

Analemma shows the sun’s path over a year

An analemma is a figure-8 curve showing the position of the sun at a chosen time of day (often, noon) over a year. Here's one on the side of a house.

Stark reality of California drought from space

This image is from June 2021. It shows barren hillsides and dry trees in a national forest, during the California drought. Click in for a comparison image from 2020.
Space

Astronomers spot largest rotation in the universe

Astronomers have found the largest rotation in the universe by analyzing red and blue shifts in galaxies funneling along filaments in the cosmic web.

The 1st microsecond of the Big Bang

Researchers used the Large Hadron Collider to investigate the 1st matter formed in the 1st microsecond of Big Bang. They said it had liquid-like properties.

Scientists release best-ever dark matter map

Astronomers with the Dark Energy Survey have created the largest-ever map of dark matter, using artificial intelligence. It covers 100 million galaxies.

Whales make rainbows

Whales are magnificent creatures and ... whales make rainbows. Photos and video here.

Lucky strike: Space debris smacked ISS robotic arm

Space officials called it a "lucky strike" when space debris smacked into the skinny robotic arm on the space station, creating a hole now seen in images.

Photos! The close Mercury-Venus conjunction

Closest Mercury-Venus conjunction until 2033 It hasn’t been easy, but members of the EarthSky community have caught photos of the...

Watch for the legendary green flash

It's said that once you see a green flash, you'll never again go wrong in matters of the heart. Here's how to see one!

ISS passing Polaris, seen from Canada

What a catch! This EarthSky community member caught the International Space Station (ISS) slicing across the night sky on May 17, 2021, passing Polaris, the North Star.

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