ESA’s (European Space Agency) Herschel space observatory has been studying galaxies that are very large. Some have masses over 300 billion times that of the sun.
The Andromeda galaxy can be seen with the naked eye as an elongated cloud located in the direction of the constellation Andromeda (the Chained Maiden).
The Hubble Space Telescope has taken the first visible light snapshot of a planet circling another star. A planet outside our solar system is called an extrasolar planet, or an exoplanet.
Scientists believe the universe is expanding in all directions and has been ever since the Big Bang. Stars and galaxies have been observed moving away in all directions.
Organic molecules have been detected on a planet in another solar system. Organic molecules are necessary for the chemical reactions to form life as we know it.