Posts by 

Deborah Byrd

Comets and asteroids: What’s the difference?

Comets and asteroids both orbit our sun, but usually reside in different parts of our solar system. And except for a few, they're different materials.

Photos of Venus-Saturn conjunction, January 2023

Photos of Venus-Saturn conjunction, via the EarthSky community, on and around January 22, 2023. Plus the young moon joined the show. Beautiful!

Jupiter closest to sun in 12 years on January 20

Jupiter's perihelion (closest point to the sun) comes January 20 at 12 UTC. The distance between the sun and Jupiter is now 460 million miles (740 million km).

Top tips for observing the sun safely

There's a giant sunspot visible in January 2023. Some tips for observing the sun safely, plus videos and links, here.

Visible planets and night sky January and February

February 2023 visible planets including dazzling Jupiter and Venus in the west after sunset. Mars is high in the evening sky. Mercury is up before sunrise.

Orion the Hunter is easy to spot in January

Orion the Hunter is one of the easiest constellations to identify thanks to its Belt, the 3 medium-bright stars in a short, straight row at his waist.

Lenticular clouds look like UFOs

Lenticular clouds look like UFOs. See photos of lenticular clouds in various parts of the world, from the EarthSky community.

Astronomers find 8 new super-hot stars

An international team of astronomers - using a telescope in South Africa - have discovered 8 new super-hot stars that shed light on how stars evolve.

Many mammals headed for extinction, study says

A new study focuses on mammals headed for extinction. It shows that human activities push animals into poor-quality environments, where they often do poorly.

What is a supermoon? And when, in 2023?

In 2023, there are 3 new supermoons. And there will be a full supermoon on July 3, August 1, August 31 and September 29. The August 31 one is also a Blue Moon.