There are many reasons why binoculars are useful in amateur astronomy. Here are eleven.
1. Accessory to Telescope
2. Above Horizon Viewing
Binoculars are great for checking out stars and planets just above the horizon.
3. Viewing Comets
For observing bright comets like 21P, 38P, and 46P of 2018 that grace our skies from time to time and are spectacular sights.
4. Find Outer Planets
With binoculars, you can search out Uranus and Neptune with the help of finder charts.
5. Planet Viewing
They are useful for planet viewing. You can see the red color of Mars, Aldebaran, Betelgeuse, and Antares clearly through a good set of binoculars. Alpha Centauri can be seen as yellow and Beta Centauri as blue.
6. Lunar Occultations
Small binoculars are ideal for lunar occultations (when the Moon passes in front) of a star of magnitude 4 or less (brighter).
7. Moon Features
They are great for checking out the large craters and maria (seas) on the Moon.
8. Finding Fainter Stars
Best for finding the fainter stars shown in star atlases and finder charts.
9. Dim Stars
They help with finding stars that appear dim because of the position of the Moon in the sky.
10. Moons of Jupiter
Observing the moons of Jupiter as they move around the planet.
11. Great for Kids
Binoculars are lightweight and easy to use and so are a great way to get children interested in astronomy.