The Sun’s mass is mainly consist of which of the following?
A. Hydrogen
B. Nitrogen
C. Carbon dioxide
D. Silicon (more…)
Which instrument is used for viewing the sun?
A. Stroboscope
B. Helioscope
C. Solograph
D. None of these
In general, Comets have _____ orbits.
A. Elliptical
B. Highly elliptical
C. Circular
D. Parabolic
Which one of the following is the largest Galaxy in the universe?
A. Andromeda Galaxy
B. Milky-Way
C. Spiral Galaxy
D. Horseshoe Galaxy