Space Quizz

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Challenge yourself to a Quiz by clicking the purple words.Some of the Quistions you have not learnt on this blog.Give Yourself a pat on the back if you get them all right.But if you don't,don't worry.

Titan (One of Saturns moons)

Titan is much larger than the neigbouring Saturnian moons.It is larger than Mercury and Pluto and the second largest moon in the solar system after Jupiters Ganymede.It was discoverd in 1655 by the Dutch astronomer Christan Huygens,the first moon to be detected following Galileos revolutionary discovery of four moons orbiting Jupiter.Titan is the only body in the solar system to contain a nitrogen-rich atmousphere like Earths,although it is much more dense.

Callisto (One of Jupiters moons)

Callisto's dark and dirty,icy crust is coverd with craters.The largest,Valhalla,has shockwaves that spread out some 3,000 km (1,865 miles).Astronomers believe the crust hides a rocky core.

Europa (One of Jupiters moons)

Europa has an icy surface criss-crossed with lines that suggest deeper activity.Sientists believe the ice may cover a liquid salty ocean,with a possibillity of aquatic life.in fact, it has become the most likely place extraterrestrail life in our solar system.

Ganymede (One of Jupiters moons)

Ganymede in lager than Mercury,but it is not a planet as it doesn't orbit the sun.Scientists think this moon has a molten core,surrounded by a rocky mantle,possible salt water,and an ice shell.

Io (One of Jupiters moons)

Io is constantly undergoing volcanic eruptions across its surface,the result giving it an amazing yellow-orange colour.In fact it has more than 100 active volcanoes! The eruptions happen because this moon is continually tugged and pushed around by the gravities of the other three.

Dying Star

When a stars core stops fusing hydrogen to make helium,it exits the main sequence and enters its death throes.The equilibrium the star fought so arduosly to attatin at the beginning of its life is upset,as the radiation output ceases and the star begins contracting under gravity.The energy generated by this collapse heats up the stellar atmosphere where hydrogen is still present.The stellar atmosphere becomes so hot and pressurized thet fusion of this hydrogen store takes place.This process causes to swell in size to become a giant.

Light echoes

Twenty thousand light years away-at the very edge of our galaxy-starV838 Monocerotis underwent a sudden outburst in January 2002.It became 600000 times brighter than the sun,making it the most iuminous star in the Milky Way.These three images from the Hubble Space telescope chronical the progress of the flare-up,which researches still cannot explain.