Author Question: An extraterrestrial observer would pick up the strongest radio signals when A) the Earth was at ... (Read 31 times)

rachel9 · **on:** Jul 27, 2018

An extraterrestrial observer would pick up the strongest radio signals when

A) the Earth was at perihelion.
B) at new or full moon.
C) North America was directly in front of the observers.
D) North America was either rising or setting for the observer.
E) the Super Bowl is on.

Question 2

Why is infrared much better than visible light in studying star formation?

What will be an ideal response?

mcinincha279 · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

D

Answer to Question 2

Before the protostar begins shining, it will heat enough to glow red, but this radiation is hidden behind a shroud of dust that absorbs light, but not heat. Thus the dark nebula often have heat sources imbedded within them that someday will crawl out of the womb and shine as stars as well.