Summary:
- Since the early 1990s, astronomers have discovered other solar systems.
- As of April 2014, more than 4,600 exoplanets have been found, with 1706 confirmed.
- Most are discovered because of some tell-tale signs, such as the slight motion of a star.
- If there is life elsewhere in the Universe, it is most likely on an Earth-like exoplanet.
- According to NASA, a statistical analysis shows that the Milky Way galaxy contains 100 million planets.
- In this video by Science Friday, artist Helena Kauppila explains how she makes drawings of the night sky.