1.
2.
100

a piece of rock orother matter from space that travels through the atmosphere

meteor

100

used for describing things relating to the Sun

Solar

200

to stop something

cease

200

one of many large rocks that circle the Sun

asteroid

300

to hit or attack someone or something forcefully

strike

300

to increase in size, number or importance

expand

400

each of the lines in which light (and heat) may seem to stream from its place of origin

ray

400

to fall down suddenly because of pressure or having no strength or support

collapse

500

a star that has exploded, strongly increasing its brightness

Supernova

500

to break open or apart suddenly or to make something do this

burst