Star and Galaxy Simulation

Doppler Effect We have heard an ambulance siren and felt that the ambulance is getting closer. When the ambulance approaches,...

Star brightness and apparent magnitude Hipparchus of ancient Greece distinguished the stars in the night sky according to their brightness....

Constellations and distance to stars If you look at the sky where there is no light on a clear night,...

Surface temperature and color of object When the iron is heated, it is initially dark red, but as the iron’s...

Parallax When an object is close to me, you can use a ruler to measure the distance. But, it isn’t...

Parallax When an object is close to me, you can use a ruler to measure the distance. But, it isn’t...

Parallax When an object is close to me, you can use a ruler to measure the distance. But, it isn’t...

Constellations If you look at the sky where there is no light on a clear night, there are so many...

Doppler Effect By listening to the ambulance’s siren, we can tell if the ambulance is coming or going. When an...