Why does the Milky Way appear as a band of light in the sky?
What will be an ideal response?
The solar system lies in the outer parts of the thin disk of a spiral galaxy. Thus when we look along the plane of the disk, we see large numbers of stars that, to the naked eye, merge into a band of light. When we look out of the plane of the disk, there are very few stars and the night sky is much darker.
You might also like to view...
If you drop a coin inside a car that is turning a corner to the right, the coin will land
A) to the left of the drop point. B) in North Dakota. C) to the right of the drop point. D) right under the drop point. E) to the rear of the drop point.
If a beam of radiation has an intensity of 120 W/m2, what is the maximum value of E?
A) 1.5 × 103 V/m B) 0.000001 T C) 1.0 × 10-6 V/m D) 3.0 × 102 V/m E) 3.2 × 10-3 V/m
Old stars are poor in heavy atoms because there were very few previous generations of stars before the old stars formed
Indicate whether the statement is true or false
The most abundant element in the universe
A) hydrogen. B) helium. C) lead. D) uranium.