Activities: Universe

Constellations

어려움: ★ ★

Astronomy softwares

어려움: ★ ★

Astropuzzle 

어려움: ★

Birthday stars

어려움: ★

The search for extraterrestrial intelligence

어려움: ★

Invent an alien

어려움: ★

Micro and macrocosmos

어려움: ★

Making a constellation slide

어려움: ★