Yes, telescopes can be used to see planets in outer space. In fact, some of the most famous planets in our solar system, such as Jupiter and Saturn, can be seen with the naked eye. However, telescopes can also be used to see planets that are much further away from Earth, such as Uranus and Neptune.

To see planets in outer space, telescopes use a variety of different techniques. Some telescopes use mirrors to focus light from the planet, while others use lenses. Some telescopes also use special filters to block out unwanted light, such as sunlight, so that the light from the planet can be seen more clearly.

The type of telescope that is best for seeing planets depends on a variety of factors, such as the size of the planet, the distance of the planet from Earth, and the amount of light that the planet reflects. Some telescopes are better at seeing planets that are close to Earth, while others are better at seeing planets that are far away. Some telescopes are also better at seeing planets that are bright, while others are better at seeing planets that are dim.

By using different types of telescopes, astronomers have been able to learn a great deal about the planets in our solar system. Telescopes have also been used to discover planets in other solar systems.