What is skylab?

A) space probe

B) space station

C) space shuttle

D) space observatory

B) space station

Explanation:

Skylab refers to the space station of United States of America. It was the first of its kind to be operated by US. The Skylab orbited the Earth's orbit for six years from 1973 to 1979. The decaying orbit led to its entry into the atmosphere again. Some of its debris fell into the Indian Ocean and over residential regions of Western Australia.

Its B

Explanation:

Skylab was the first United States space station, launched by NASA, occupied for about 24 weeks between May 1973 and February 1974. It was operated by three separate three-man crews: SL-2, SL-3 and SL-4. Major operations included an orbital workshop, a solar observatory, Earth observation, and hundreds of experiments.