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  2. Human presence in space - Wikipedia

    en.wikipedia.org/wiki/Human_presence_in_space

    Human presence in outer space began with the first launches of artificial object in the mid 20th century, and has increased to the point where Earth is orbited by a vast number of artificial objects and the far reaches of the Solar System have been visited and explored by a range of space probes.

  3. Space environment - Wikipedia

    en.wikipedia.org/wiki/Space_environment

    Radiation in space usually comes from three main sources: The Van Allen radiation belts; Solar proton events and solar energetic particles; and; Galactic cosmic rays. For long-duration missions, the high doses of radiation can damage electronic components and solar cells.

  4. Human spaceflight - Wikipedia

    en.wikipedia.org/wiki/Human_spaceflight

    There are two main sources of hazard in space flight: those due to the hostile space environment, and those due to possible equipment malfunctions. Addressing these issues is of great importance for NASA and other space agencies before conducting the first extended crewed missions to destinations such as Mars.

  5. Spaceflight - Wikipedia

    en.wikipedia.org/wiki/Spaceflight

    Spaceflight (or space flight) is an application of astronautics to fly objects, usually spacecraft, into or through outer space, either with or without humans on board.Most spaceflight is uncrewed and conducted mainly with spacecraft such as satellites in orbit around Earth, but also includes space probes for flights beyond Earth orbit.

  6. Space exploration - Wikipedia

    en.wikipedia.org/wiki/Space_exploration

    Space exploration, like its classical form astronomy, is one of the main sources for space science. While the observation of objects in space, known as astronomy , predates reliable recorded history , it was the development of large and relatively efficient rockets during the mid-twentieth century that allowed physical space exploration to ...

  7. Space sustainability - Wikipedia

    en.wikipedia.org/wiki/Space_sustainability

    The space field should be used peacefully, jointly protect the space field from harm, and maximize space utilization through environmental, economic, and security exploration of space. [16] These consensuses also clarify the relationship between space sustainability and international security, that states and individuals explore space for ...

  8. Stephen Hawking: 'Human race has no future' without space travel

    www.aol.com/news/2016-09-27-stephen-hawking...

    Stephen Hawking is a supporter of space travel, in part, because he thinks the survival of humanity depends on it. Hawking shared these thoughts in an afterword for Julian Guthrie's book "How to ...

  9. Benefits of space exploration - Wikipedia

    en.wikipedia.org/wiki/Benefits_of_space_exploration

    Space engineers helped design heart pumps now used to keep people in need of heart transplant alive until a donor heart becomes available. [28] Discoveries concerning the human body and space, particularly the effects on the development of bones, may provide further understanding of biomineralization and the process of gene transcription. [29]