SOLAR SYSTEM

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UNIVERSE

SPACE EXPLORATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following is the first challenge that had to be overcome by rockets in order for humans to explore space? First, rockets needed ____
A
a place in which the astronauts could sit.
B
a way to return to Earth’s surface.
C
enough thrust to overcome Earth’s gravity.
D
landing gear that worked on another planet.
Explanation: 

Detailed explanation-1: -The Hubble Space Telescope makes one orbit around Earth every 95 minutes.

Detailed explanation-2: -Spacecrafts must provide their passengers with oxygen to breathe. Spacecrafts carry their own sources of oxygen and nitrogen. These gases are circulated throughout the spacecraft to provide similar air to the one we breathe on Earth. Astronauts must also carry their entire food supply when they travel to space.

Detailed explanation-3: -First, with telescopes, then with satellites, then space rovers, and ultimately with manned spacecraft.

Detailed explanation-4: -On Oct. 4, 1957, the Soviets launched the first artificial satellite, Sputnik 1, into space. Four years later on April 12, 1961, Russian Lt. Yuri Gagarin became the first human to orbit Earth in Vostok 1.

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