| 1. Our solar system is located in the orion arm of the Milky way galaxy, about two-third of the way out from the centre. |
| 2. The solar system formed from an interstellar cloud of dust and gas or nebulla about 4.6 billion years ago. |
A) 1 only
B) 2 only
C) Both 1 and 2
D) Neither 1 nor 2
Correct Answer: C
Solution :
Our solar system is located in the orion arm of the milky way galaxy, about two-third of the way out from the centre. The sun is about 26,000 light-years from the center of the Milky Way Galaxy, which is about 80,000 to 120,000 ight-years across (and less than 7,000 light-years thick). We are located on one of its spiral arms, out towards the edge. It takes the sun (and our solar system) roughly 200-250 million years to orbit once around the Milky Way. In this orbit, e (and the rest of the Solar System) are traveling at a velocity of about 155 miles/sec (250 km/sec).
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