How does the collecting area of a 10-meter telescope compare with that of a 2-meter telescope?
it’s 5 times greater
it’s 10 times greater
it’s 25 time greater
Jovian planets are denser
Jovian planets are made of rocks
Terrestrial planets are heavier
Terrestrial planets are made of rocks
How would the solar system be different if the solar nebula had cooled, with a temperature half its actual value?
Jovian planets would have formed closer to Sun
There would be no asteroids
There would be no comets
Terrestrial planets would be larger
Which of these facts is NOT explained by the nebular theory?
There are two main types of planets: terrestrial and jovian
Planets orbit in same direction and plane
Existence of asteroids and comets
Number of planets of each type (four terrestrial and four jovian)
Imagine Jupiter surrounded by a disc of rocky debris. Moons of Jovian planets form in such miniature disks. How many moons does Jupiter have?
According to our best theory of the formation of the Solar System, the Sun and the planets condensed out of a flattened, spinning disk. Which of the following observations about the Solar System is NOT evidence for this theory?
The orbits of the planets are all roughly in a single plane
The Sun’s rotation and the planets’ revolution are in the same direction
The rotation axis of Uranus lies almost in the plane of its orbit around the Sun
The Sun’s rotational equator is almost the same as the plane of the Earth’s ecliptic