The Outer Space Treaty, formally known as the Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies, is the cornerstone of international space law. It was adopted by the United Nations General Assembly in 1967 and has been ratified by over 100 countries.

Outer space is considered to be a global commons, meaning that it is not subject to the sovereignty of any individual state. This principle is enshrined in Article II of the Outer Space Treaty, which states that "outer space, including the moon and other celestial bodies, is not subject to national appropriation by claim of sovereignty, by means of use or occupation, or by any other means".

The three main principles of international space law are freedom of exploration and use, non-appropriation, and liability for damages. These principles are reflected in Articles I, II, and VII of the Outer Space Treaty.

The Soviet Union was the first country to launch an artificial satellite into orbit, with the launch of Sputnik 1 in 1957. This event marked the beginning of the space race between the Soviet Union and the United States.

Astronauts and cosmonauts are considered to be civilians under international law. This is reflected in Article V of the Outer Space Treaty, which states that "astronauts shall be regarded as envoys of mankind in outer space" and that they "shall be afforded assistance in case of distress".

The United Nations Office for Outer Space Affairs (UNOOSA) is the international organization responsible for coordinating international cooperation in space activities. It was established in 1961 and is headquartered in Vienna, Austria.

The purpose of the Moon Agreement is to regulate the exploitation of natural resources on the moon. It was adopted by the United Nations General Assembly in 1979, but has not yet entered into force.

The United States has the largest number of satellites in orbit, with over 2,000 active satellites. China is a close second, with over 1,000 active satellites.

Space debris is not subject to any specific legal regime. However, there are a number of international guidelines and recommendations that address the issue of space debris, such as the United Nations Guidelines for the Long-term Sustainability of Outer Space Activities.

The International Space Station (ISS) is the only international space station that is currently in orbit. It is a joint project of the United States, Russia, Canada, Japan, and the European Space Agency.

The Soviet Union was the first country to send a human being into space, with the launch of Yuri Gagarin in 1961.

Neil Armstrong was the first human being to walk on the moon, during the Apollo 11 mission in 1969.

The United States has the most astronauts in space, with over 300 astronauts having flown into space. Russia is a close second, with over 200 astronauts having flown into space.

SpaceX was the first private company to launch a rocket into orbit, with the launch of the Falcon 1 rocket in 2008.

Blue Origin was the first private company to send a human being into space, with the launch of Jeff Bezos in 2021.