The Horsehead Nebula, first discovered by Harvard astronomer Williamina Fleming on a glass plate in 1888 at Harvard Observatory.

For more reading on the Harvard Computers, read The Glass Universe by Dava Sobel.

An emission nebula with an open star cluster located in Cassiopeia, 9,200 light-years away. Check out NASA Information on the importance of star cluster NGC 281!

A face-on spiral galaxy located approximately 2.7 to 3 million light-years from Earth in the constellation Triangulum. She’s the third-largest member of our local cluster of galaxies, following the Andromeda Galaxy and the Milky Way!

Oh, you know all about Orion. You can even see this nebula with your naked eye (depending on the time of year and surrounding city lights)! She’s the closest star-forming cluster to us, located about 1,300 light-years from Earth.

An emission nebula about 7,500 light-years away from Earth in the constellation Cassiopeia. She spans about 300 light-years across.

Andromeda is moving towards us at about 200 miles per second! Someday we’ll merge with her. It’ll take a bit of time, as she’s about 2.5 million light-years from Earth. She’s larger than our Milky Way, at about 150,000 to 200,000 light-years across, and contains around 1 trillion stars.

An emission nebula in the constellation Cygnus, about 1,500 to 2,200 light-years away from Earth, spans around 100 light-years across. Her red color comes from ionized hydrogen gas.

Also known as the Skull Nebula and one of my favorites. She’s located in the constellation Monoceros and is about 5,000 to 5,200 light-years from Earth.

She spans roughly 100 to 130 light-years across and contains NGC 2244—a bright open cluster of young stars. The cluster's stellar winds and radiation cause the hydrogen to glow red.

Keep an eye on this one. The middle Wolf-Rayet star is expected to detonate in a supernova explosion within the next 100,000. She’s about 5,000 light-years from Earth in the constellation Cygnus.

Comet 3I/ATLAS, discovered on July 2, 2015, was the third confirmed interstellar object to pass through our solar system, reaching its closet point to the sun October 29, 2025.

Its speed exceeded 130,000 to 150,000 miles per hour.