What are facts about faraway worlds?

* There are billions of planets in our galaxy. Astronomers estimate that there are about 100 billion stars in the Milky Way, and each star could have multiple planets orbiting it. This means that there could be trillions of planets in our galaxy alone.

* Some planets are very close to their stars. These planets are called "hot Jupiters" because they are similar in size to Jupiter but orbit their stars very closely. Hot Jupiters can have surface temperatures of over 1,000 degrees Celsius.

* Some planets are very far from their stars. These planets are called "cold Jupiters" because they are similar in size to Jupiter but orbit their stars very far away. Cold Jupiters can have surface temperatures of below -200 degrees Celsius.

* Some planets have liquid water on their surfaces. Liquid water is essential for life as we know it, so these planets are considered to be potentially habitable. Some of the most promising candidates for habitable planets include Kepler-186f, Kepler-452b, and Proxima Centauri b.

* There may be planets that orbit other stars in our solar system. These planets are called "rogue planets" because they do not orbit any stars. Rogue planets are very difficult to detect, but astronomers believe that they may exist.

These are just a few of the fascinating facts about faraway worlds. As our technology continues to improve, we are learning more and more about the planets that exist beyond our solar system.