1Visit the observatory or planetarium nearest to your school, observe astronomical bodies through the powerful telescope kept there, and prepare a visit report. What should that report contain?
2When you take a virtual tour of the sky using a piece of software or an application, what features of a galaxy can you note down?
3What is a galaxy? Write the definition.
4Something that looks like a single star to the naked eye may in fact be a whole galaxy. Why does that happen?
5Write down the shapes by which galaxies are classified.
6Which galaxy does our solar system lie inside? Write two facts about it.
7What is believed to lie at the centre of a galaxy, and how do the stars there move?
8Write the difference between a nebula and a galaxy.
9How many galaxies are estimated to exist in the observable universe, and where did that estimate come from?
10Write five examples of galaxies.
11Which force holds a galaxy together instead of letting it scatter? What would happen without it?
12Name one observatory centre in Nepal, say where it is, and say what can be done there.