open star cluster

Open star cluster (def): A group of up to a few thousands of stars loosely bound by gravitational attraction and formed from the same giant molecular cloud.

« Back to Glossary Index

Featured Articles

binoculars for astronomy beginners best options

Beginners Guide To Choosing Binoculars For Astronomy

In addition to a great telescope, there are many reasons to consider a good set of binoculars for astronomy. ...

Best Telescope To See Planets From Your Backyard

With so many telescopes out there, it’s hard to know which one to buy for that experience you yearn. ...

Best Telescope Under 200 [What to Expect]

This buyer’s guide covers what the beginner needs to know on getting a budget-priced best telescope under 200. Best ...

6 Best Books on Astronomy for Beginners [+ free PDFs]

Astronomy opens the door to the universe. It comes with having to learn new terms and technology. The jargon ...

best telescope eyepieces to get as extras

Choosing The Best Telescope Eyepiece

With the right eyepieces you get better views. There are many modern eyepiece designs to choose from and knowing ...

Popular Reads

Moon halo, ring around the Moon seen from Earth

Moon Halos And Weather Predictions

If you’re wondering about that ring around the Moon and what it means, you might be interested in the ...

Telescope Storage Ideas to Avoid

If you’re looking to buy or have already have one, you might be wondering ‘where should I store my ...

Celestron vs Orion Vs SkyWatcher (Which Brand Makes The Best Telescopes?)

You might be in the market for buying a new telescope and wondering which is better Celestron vs Orion ...

Dobsonian Telescope Advantages and Disadvantages

What’s a Dobsonian and why is it different to other telescopes for astronomy? In the following, I discuss the ...

Man wondering, telescope viewing with glasses or not?

Using a Telescope With Glasses Or Astigmatism [What To Know]

Should I use my telescope with or without my glasses? It’s a dilemma most eyeglass wearers have when using ...

Choosing The Best Telescope Eyepiece

With the right eyepieces you get better views. There are many modern eyepiece designs to choose from and knowing ...