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Other than for a few days around the new Moon, our Moon is always visible from Earth. Using binoculars or a telescope, we can see moons orbiting Jupiter. These moons all orbit a planet. It may make you wonder about how many moons does the Sun has. To answer this [...]
The Sun has dark areas on its surface. We call these small dark areas sunspots. This may lead to some people asking why do sunspots appear dark in pictures of the Sun. Sunspots are not permanent features on the Sun’s surface. They appear and disappear and move across the face [...]
Equatorial mounts are one of the most popular types of mounts. However, unlike alt-azi mounts, their setup is a little more complicated. Don’t let that concern you as here we provide an easy way to setup a telescope equatorial mount. Following is a step-by-step procedure to set up your equatorial [...]
You must understand the limitations of any telescope. It is possible to calculate many of the parameters. Fortunately, only a few variables are required to make these calculations. However, finding an online calculator to do the calculations quickly is easier. On this page, you will find an easy-to-use telescope calculator. [...]
Stars are bright objects that we can see in the night sky. During the day, we see the brightest object in the sky is also a star. Of course, I am referring to our Sun. Our Sun is a very ordinary star. Due to the brightness of stars (including our [...]
There are various kinds of telescopes although the main three categories are refractor, reflector and compound telescopes. But what kind of telescope uses only lenses? We will take a look at refracting telescopes and consider how they work including their limitations. Refracting Telescopes A refracting telescope is the only design [...]
Throughout history, humanity has looked up at the night sky with awe and wonder. The stars, planets, and other celestial bodies have captivated our imaginations for millenia. This may make you wonder what can you see with a telescope. The telescope is one of the most powerful tools at our disposal [...]
The Hubble Space Telescope was launched into low-earth orbit on April 24th 1990. It has been observing the universe for 33 years. But how far can the Hubble Telescope see? We’ll examine what it’s seen and discovered, how big it is and who it was named after. We’ll also look [...]