Fact 1
Humans began the physical space exploration during the 20th century with the advent of high-altitude balloon flights, followed by manned rocket launches.
Fact 2
Earth orbit was first achieved by Yuri Gagarin of the Soviet Union in 1961 and unmanned spacecraft have since reached all of the known planets in the Solar System.
Fact 3
Space is not completely empty, but consists of a hard vacuum containing a low density of particles: predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, and neutrinos.
is the closest to the Sun of the eight planets in the Solar System.
is an African-American inventor, physicist, and space scientist
An astronaut and American physicist.
is the third planet from the Sun.
is an arcade video game developed by Tomohiro Nishikado and released in 1978
is the eighth and farthest planet from the Sun in the Solar System.
Is the largest landlocked country in the world bordered by Russia, Kyrgzstan, Rurkmenistan, Uzbekistan and China located partly in Central Asia and partly in Europe.
A German rocket engineer and space architect.
is the sixth planet from the Sun.