Astronomy Staff, Author at Astronomy.com | Page 253 of 278

Globular clusters sort their stars

Science, Solar System

The Moon’s fresh face

Astronomy magazine podcast: Touring Taurus

Brilliant flare seen in II Pegasi

Science, Solar System

Titan gives clues about early Earth

A Hubble and Spitzer masterpiece

Sky-event notice: Mercury crosses the Sun

Human Spaceflight, Space Exploration

Astronomy magazine podcast: Hubble repair mission

Small stars created major dust

In “Who knows what dangers lurk in space?” (March 2006), you stated, “Cerenkov radiation occurs when certain high-energy particles move through water or the atmosphere faster than the speed of light.” How can anything exceed the speed of light?

Does the Moon follow the same path across the sky as the Sun?

Human Spaceflight, Space Exploration

Hubble fix a “go”