Sky This Week is brought to you in part by Celestron. Friday, January 23Pluto reaches conjunction with the Sun at 5 A.M. EST.

Back in my youth, one of the astronomers I had the good fortune to befriend was the great Bart Bok (1906–1983). This was near the end of his life, long after he had revolutionized our understanding of ...

The Heart Nebula (IC 1805) is a large star-forming region. It contains a young star cluster (Melotte 15). The nebula is about 7,500 light-years away and over 300 light-years across. Viewing requires a ...

Join the McDonald Observatory as they explore the constellation of Orion. Learn about Orion’s cultural significance in early ...