Popular Articles

How to Determine Which Eyepieces to Use with Your Telescope
SCT & EdgeHD Collimation Guide
Aligning Your Celestron Finderscope: A Step-by-Step Guide
Why is my Telescope Showing Everything Upside Down? Is There Something Wrong with it?
Which scope aperture is best for different kinds of objects?

Will TheSky software run on Windows Vista?

TheSky was supplied with Celestron telescopes sold before 2009. It will run in Vista 32, but will display a registry error when the program launches and may have other problems....

Will TheSky software run on Windows Vista?

TheSky was supplied with Celestron telescopes sold before 2009. It will run in Vista 32, but will display a registry error when the program launches and may have other problems....

I'm having problems with my NexStar SLT StarPointer. How do I fix them?

If the StarPointer no longer shows the red dot when turned on, it probably needs a new battery. It uses the 3V CR2032 lithium wafer battery. You can get these...

I'm having problems with my NexStar SLT StarPointer. How do I fix them?

If the StarPointer no longer shows the red dot when turned on, it probably needs a new battery. It uses the 3V CR2032 lithium wafer battery. You can get these...

My NexStar GPS takes a long time to link, and the date-time is wrong. Do...

Your NexStar GPS has a GPS module with a small rechargeable battery soldered to an internal board. It keeps the date and time and recent data elements from GPS satellites....

My NexStar GPS takes a long time to link, and the date-time is wrong. Do...

Your NexStar GPS has a GPS module with a small rechargeable battery soldered to an internal board. It keeps the date and time and recent data elements from GPS satellites....

How do I replace the NexStar GPS telescope's internal battery?

Your NexStar GPS has a GPS module with a small rechargeable Panasonic ML621 battery clipped or soldered to an internal board. It keeps the date and time and recent data...

How do I replace the NexStar GPS telescope's internal battery?

Your NexStar GPS has a GPS module with a small rechargeable Panasonic ML621 battery clipped or soldered to an internal board. It keeps the date and time and recent data...

How do I collimate my SLT refractor telescope?

Collimation is the proper alignment of the optical elements--lenses and mirrors--in your telescope. Collimation is important for getting the best out of your scope. Poor collimation will result in ...

How do I collimate my SLT refractor telescope?

Collimation is the proper alignment of the optical elements--lenses and mirrors--in your telescope. Collimation is important for getting the best out of your scope. Poor collimation will result in ...

How do I use my telescope eyepieces?

How do I use my telescope eyepieces?

Your eyepieces are the first accessories you should learn to use with your telescope. Eyepieces have different diameters that allow you to view objects through your telescope at a variety...

How do I use my telescope eyepieces?

Your eyepieces are the first accessories you should learn to use with your telescope. Eyepieces have different diameters that allow you to view objects through your telescope at a variety...