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  • Writer's pictureAndrew Garner

The Most Common Questions About Telescopes

Updated: Aug 1, 2023

As a fellow star enthusiast who has traveled on many a stargazing adventure, I've come across a multitude of questions that sometimes made me wish for an expert by my side. I know how understanding and choosing the right telescope can become an uphill task. To make this journey easier for you and to enhance your stargazing experiences, I've compiled and answered some of the most frequently asked questions I've encountered along the way.

What Is the Best Telescope to See Other Planets?

To truly appreciate the wonders of our solar system, choosing the right telescope is paramount. There are several factors to consider when selecting a telescope to view other planets.

In my stargazing journey, I've found the following elements to be of significant importance:

  • Resolution: The resolution of your telescope plays a significant role in the clarity of the planetary views. Higher resolution results in clearer, more detailed images. This aspect is often associated with the aperture of your telescope - the larger it is, the higher the resolution.

  • Type of Telescope: Among the different types of telescopes, refractor telescopes are often my go-to choice for planetary viewing. They provide sharp, high-contrast images, which are crucial for observing the subtle details on planetary surfaces. These telescopes use lenses to gather and focus light, which leads to less optical distortion compared to other types.

  • Aperture Size: Aperture refers to the diameter of the telescope’s lens or mirror — the part that gathers light. A larger aperture allows the telescope to collect more light and thus, reveal more details. To see finer details on planets, I usually recommend a telescope with an aperture of at least 3.5-4 inches (90-100mm).

  • Magnification: While magnification is an important aspect, it's essential to remember that higher magnification does not always equate to better views. Overly high magnifications can lead to blurry images. The ideal magnification depends on the object you're observing, the aperture of your telescope, and the atmospheric conditions.

Remember, the "best" telescope largely depends on your personal preferences and what you intend to observe. But for planetary viewing, prioritize resolution and choose a reliable type of telescope, like a refractor, with a reasonable aperture. That way, you'll be all set to explore the intricate details of our solar neighbors. By the way, I reviewed this telescope, and this a really good telescope fr beginners: I Tested the Amazon's Choice Telescope

Solomark 70EQ

Credit: Amazon

Which Space Telescope Is Best?

Space telescopes, such as the Celestron NexStar or GSkyer 80mm AZ Refractor , are really great choices for observing celestial objects beyond the capacity of ground-based telescopes, due to the absence of atmospheric interference. I wrote a review about them here, take a peak!

What Are the 4 Different Types of Telescopes?

When we talk about stargazing, it's crucial to understand that there isn't just one type of telescope to fit all needs. Various types have been designed over centuries, each bringing a unique advantage to the table. In my years of astronomy, I've grown to appreciate these four main types:

  • Refractor Telescopes: These are the traditional telescopes that come to mind for most people. They operate using a lens to gather and focus light. Some of the main advantages of refractor telescopes include their robust and low maintenance design, sharp images, and their excellent performance in observing planets and the moon. However, larger models can be quite heavy and expensive.

  • Reflector Telescopes: Instead of lenses, reflector telescopes utilize mirrors to collect and focus incoming light. These telescopes excel in viewing beyond our solar system, capturing deep sky objects like galaxies, star clusters, and nebulae with more clarity. One of the major benefits of reflector telescopes is the cost-effective large apertures. However, they might require regular alignment (known as collimation) of their mirrors.

  • Compound (or Catadioptric) Telescopes: As the name implies, compound telescopes use a combination of lenses and mirrors. The design offers versatility, allowing for detailed views of both celestial and terrestrial objects. Models like the Schmidt-Cassegrain and Maksutov-Cassegrain telescopes are common examples. These are portable and user-friendly, but can be pricier compared to refractors and reflectors of similar aperture.

  • Radio Telescopes: These are different from the optical telescopes mentioned above. Instead of visible light, radio telescopes detect radio waves emitted by celestial bodies. They can operate in all weather conditions and day or night, giving a different perspective of the universe. However, due to their complexity and size, they are more commonly used in professional astronomical research rather than amateur stargazing.


The choice among these types of telescopes depends on what you want to observe, your budget, and how much maintenance you're willing to put in. By understanding the strengths and limitations of each, you can choose the perfect telescope for your celestial explorations.

What Is the Simple Definition of a Telescope?

A telescope is an optical instrument that makes distant objects appear magnified by using an arrangement of lenses or curved mirrors and lenses, or various devices used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation.

What Size Telescope Do I Need to See Saturn's Rings?

To observe Saturn's rings, an aperture of at least 4 inches (100mm) is generally recommended. Even a modestly powered telescope can reveal Saturn's rings when the planet is well-positioned.

What Size Telescope Do You Need to See Galaxies?

To observe galaxies, an aperture of at least 6-8 inches (150-200mm) is generally recommended. A larger aperture gathers more light, which can bring out faint details in distant galaxies.

Can I See Andromeda With My Telescope?

Yes, you can see the Andromeda galaxy with a telescope, and even with a pair of binoculars or the naked eye under good conditions. It will appear as a smudgy patch, as we are only able to see the galaxy's bright core from Earth.


How Powerful of a Telescope Do You Need to See the Moon?

The moon, being our closest celestial neighbor, is an incredible object to explore with a telescope. Its features are easily visible, making it an excellent target for beginner and seasoned astronomers alike. Here's what you need to know about the power of the telescope you need to see the moon:

  • Telescope Power Isn't Just About Magnification: It's important to understand that a powerful telescope isn't just about high magnification. The quality of the image also greatly depends on the aperture size, which is the diameter of the lens or mirror that collects light. Larger aperture means more light, which allows for clearer and brighter images.

  • Start Small and Work Your Way Up: Even a small telescope or a pair of binoculars can reveal a lot of detail on the moon. For example, with a modest 30x magnification, you can already see the moon's craters, valleys, and mountains. So, if you're new to stargazing, a lower-power telescope or binocular can be a great starting point.

  • Opt for Higher Magnification for Detailed Observation: If you want to scrutinize the moon's intricate features like the central peaks of craters or rilles (narrow channels), a telescope with a higher magnification—say 100x or more—can do wonders. But remember, the view can be shaky, especially if the seeing conditions aren't perfect.

  • Invest in Good Quality Optics: Lastly, the quality of the telescope's optics makes a big difference. Even a high-powered telescope will give poor results if the optics are low quality. Therefore, it's worth investing in a telescope from a reputable manufacturer.

The Moon


So, how powerful a telescope you need to see the moon can vary greatly depending on your interest level, your budget, and what specifically you want to see. But the moon is such a rewarding object to observe that no matter what telescope you have, it promises an super inspiring view.

Can I See Mars With a Telescope?

Yes, Mars can be seen with a telescope, but keep in mind that the planet's size and distance from Earth affect the viewing quality. Mars appears as a bright, reddish point to the naked eye. With a telescope of moderate power (6-8 inch aperture), it's possible to make out some surface details when Mars is closest to Earth.


Credit: Amazon

How Strong of a Telescope Do I Need to See Pluto?

Seeing Pluto with a home telescope is difficult because it's so far away. It would require a large aperture telescope, preferably 10 inches or larger, under dark skies, and with a detailed star chart to find its precise location.

What Is the Hardest Planet to See With a Telescope?

Mercury, being the closest to the Sun, is the most challenging planet to observe because it's only visible near the horizon during morning or evening twilight, often in the glow of sunrise or sunset.

How Good of a Telescope Do I Need to See Jupiter?

To see Jupiter and its four largest moons, a small telescope or even binoculars with good magnification will suffice. But to see more details, like the cloud bands or the Great Red Spot, you'll need a telescope with a larger aperture, around 4 inches or more.

What Is the Easiest Planet to See With a Telescope?

Venus, Mars, Jupiter, and Saturn are among the easiest planets to see with a telescope. They're relatively close to Earth and are among the brightest objects in the night sky.

Can My Telescope See Jupiter?

Even a budget-friendly telescope can provide views of Jupiter and its largest moons. To see more details, such as the cloud bands or the Great Red Spot, you would need a telescope with a larger aperture.

Can Cheap Telescopes See Planets?

Yes, even a dget-friendly telescope can provide views of the moon and the planets. While the detail might not be as great as with more expensive models, you can certainly see planets like Mars, Jupiter, and Saturn and their largest moons.

Can Binoculars See Planets?

Yes, binoculars can see planets. They can provide nice views of the moon, allow you to observe the phases of Venus, spot Jupiter's four largest moons, and even give you a glimpse of Saturn's rings under good conditions.

Remember, the right telescope for you depends on your unique needs and interests. Consider what celestial objects you want to view, your budget, and your level of experience when choosing a telescope.

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