The speed in orbit, (and the period of the orbit) depends on only the size of the orbit.
The first successful artificial satellites, including the Sputniks and the manned satellites carrying Gagarin and Glenn, were in orbits barely high enough to avoid being brought down immediately by atmospheric drag. Their orbital periods were all about 90 minutes.
With a radius of roughly 4000 miles (earth's radius plus a little extra for orbital altitude), the circumference is (2 pi R) = 26,000 miles.
The speed would have been (26,000 / 90) = about 289 miles per minute = 4.8 miles per second That's about 7.5 times the moon's orbital velocity.
The first human spaceflight was undertaken on April 12, 1961, when cosmonaut Yuri Gagarin made one orbit around the Earth aboard the Vostok 1 spacecraft, launched by the Soviet space program and designed by the rocket scientists Sergey Korolyov and Kerim Kerimov.
The USSR launched the worlds first artificial satellite Sputnik. Sputnik broadcast a radio beacon as it orbited the earth, effectively rubbing the fact that they got there 1st into the Yanks faces.
Mars follows the Earth in the succession of planets orbiting the Sun. It is thus the 4th planet from the Sun.
1st Mercury 2nd Venus 3rd Earth
In our solar system, there are a total of 8 planets. Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune. Earth is the third one out from the sun.
September 1st 1513
be fast be fast
September 1st 1513
30 m/s The acceleration due to gravity is 9.81 m/s2. So, after the 1st second, it is traveling 9.81 m/s. After the 2nd second, it is traveling 19.62 m/s. After the 3rd second, it is traveling about 30 m/s.
be patient
hello
Earth Day was 1st celebrated April 22, 1970.
30
1956
75 mph
April 1st
yes it follows the same story line but its its own movie years later