Ten fun facts about Space

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.

Fact 4
The baseline temperature, as set by the background radiation from the Big Bang, is 2.7 kelvin (K).

Fact 5
The framework for international space law was established by the Outer Space Treaty, which was passed by the United Nations in 1967. This treaty precludes any claims of national sovereignty and permits all states to freely explore outer space.

Fact 6
Outer space represents a challenging environment for human exploration because of the dual hazards of vacuum and radiation.

Fact 7
Space travel has been limited to low Earth orbit and the Moon for manned flight, and the vicinity of the Solar System for unmanned vehicles.

Fact 8
In 1979, the Moon Treaty made the surfaces of objects such as planets, as well as the orbital space around these bodies, the jurisdiction of the international community.

Fact 9
In August 2012, Voyager 1 became the first man-made craft to enter interstellar space.

Fact 10
In ancient China, there were various schools of thought concerning the nature of the heavens, some of which bear a resemblance to the modern understanding.

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