Comets
Comets are large balls of rock, ice, dust and gases. They contain frozen leftovers from the early Solar System. Material that is about 4,600 million years old!
Life Elsewhere
Astrobiologists believe that three ingredients which are vital for life. They are water, energy, and organic molecules such as carbon (C). Energy and organic molecules are abundant in the Universe. But liquid water is rare.
Understanding the Solar System
After the invention of the telescope, everything changed for astronomers. They were now able to see many more objects in the night sky. These faint objects were either small, or far away, or both!
Claudius Ptolemy
Occupation
Mathematician, Astronomer, Geographer
Year born
100 AD
Research Areas
Movements of planets and stars, Cartography
Edmond Halley
Occupation
Astronomer, Mathematician
Year born
1656
Research Areas
Comets, Transits, Stars, Maths, Geophysics
Nicolaus Copernicus
Occupation
Astronomer, Mathematician, Clergyman
Year born
1473
Research Areas
Planets, Mechanics
Electric Orrery
An Orrery is a moving, mechanical model of the Solar System. It shows how all of the planets orbit around the Sun.
Distances in the Solar System Poster
How far apart are the planets in the Solar System. The answer may surprise you!
The distance between the planets in our Solar System is not regular. The inner 4 rocky planets are spaced much more tightly than the outer 4 giant planets.
Download, print and display this free poster!