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Author: Alison Klesman

Alison earned her bachelor’s degree in physics and master’s degree in earth, atmospheric, and planetary science from MIT. During this time, she completed several years of research in the field of planetary science, working on research topics that ranged from comets and asteroids to the atmosphere of Pluto. She earned her Ph.D. in astronomy from the University of Florida for work surveying active galactic nuclei in massive galaxy clusters, after which she focused on outreach at Spencer's Observatory in Tucson, Arizona. Asteroid 30286 Klesman (2000 HG61) is named after her. Alison has been with the magazine since 2016.
A golden Full Moon in a dark blue sky seen through the branches of a foreground tree.
Observing, The Moon

2026 Full Moon calendar: When to see the Full Moon and phases

The sky on February 23, 2026, at 7:30 PM CST, looking west
Observing

The Sky Today on Monday, February 23: The Moon occults some Pleiads

Lunar craters Theophilus, Cyrillus, Catharina
Observing

The Sky Today on Sunday, February 22: Track three craters on the Moon

Observing

The Sky Today on Saturday, February 21: A ghostly planetary nebula

Observing

The Sky Today on Friday, February 20: The Coma Star Cluster shines

Sky This Week, The Sky This Week

The Sky This Week from February 20 to 27: The Moon grazes the Pleiades

Observing

The Sky Today on Thursday, February 19: Mercury at greatest eastern elongation

The sky on February 18, 2026, 40 minutes after sunset, looking west
Observing

The Sky Today on Wednesday, February 18: The Moon meets Mercury

Observing

The Sky Today on Tuesday, February 17: An Antarctic annular eclipse

The path of Comet C/2024 E1 (Wierzchoś) in February 2026
Observing

The Sky Today on Monday, February 16: Catch Comet Wierzchoś in twilight

Observing

The Sky Today on Sunday, February 15: Saturn and Neptune stand close

Observing

The Sky Today on Saturday, February 14: A Valentine’s Heart (Nebula)

Posts pagination

1 2 3 … 84 Older posts
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