Did you know that you can use an iPhone to explore the night sky?
There are lots of apps available, but two of the best are Planets and Pocket Universe.
Planets is a free app that shows you where the planets are in the sky and when they rise and set. It also has a 3D view of the Earth showing where it is day and night.
Pocket Universe costs A$3.99. It displays maps of the night sky for your location, the position of Jupiter’s moon, lunar calendars and the latest space news.
The best feature of this app is that it can help you identify objects in the sky. At night, hold the iPhone up to the sky and the map will display exactly what you are looking at – no more guess work.
This is a difficult question to answer, because the number keep growing.
Volcanoes on Earth have rivers of red hot lava pouring down the sides or massive explosions of gas, rock and dust rising into the sky. But in space volcanoes are quite different.
