Question

Which is the first artificial satellite sent by Russia.

Answer 1

Hint: The first man-made satellite was developed and sent to space by the Soviet Union. It was the greatest achievement of the scientific society across the world. Space exploration began its journey with the launch of artificial satellites by different countries.

Complete answer:
Sputnik I was the first artificial satellite launched by the Soviet Russia.
It was also the first ever man-made object to fly in space. It was Russia’s greatest pride in successfully launching the satellite to outer space. It was launched on the fourth of October 1957.
The satellite stayed in one of the lower orbits of Earth for three weeks. The battery died in the meantime and the first mission was a success given the amount of technology available in the twentieth century.
The satellite was a spherical body of just 58 cm in diameter.
The launch of the satellite gave a large amount of data on the upper atmosphere. The drag experienced by the satellite during its travel helped deduce the density of the atmosphere at the various heights. The mission also gave clear ideas about the trajectory, orbits and other parameters required for space travel which thus, helped in proving the theoretical values.
The mission gave a lot of insight for future space exploration.
Many countries including India (Aryabhata in 1975) were excited about the space projects from this success.

Note:
Often the experiments in science needn’t conclude with a favourable inference. Each experiment gives a new insight for science. The space experiments are also the same. The first-hand date obtained through these missions are valuable and therefore, they can be considered successful.