Listed following are several fictitious stars with their luminosities given in terms of the sun's luminosity (lsun) and their distances from earth given in light-years (ly).
rank the stars based on how bright each would appear in the sky as seen from earth, from brightest to dimmest. if two (or more) stars have the same brightness in the sky, write the stars one below the other.
compare the result with the ranking of luminosity from largest to smallest.
a) enzo: 200 lsun , 20 ly
b) ferdinand: 400 lsun , 20 ly
c) nismo: 100 lsun , 8 ly
d) lotus: 400 lsun , 40 ly
e) shelby: 100 lsun , 10 ly

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;