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  2. Intergalactic travel - Wikipedia

    en.wikipedia.org/wiki/Intergalactic_travel

    There is no known way to create the space-distorting wave this concept needs to work, but the metrics of the equations comply with relativity and the limit of light speed. [ 9 ] A wormhole is a hypothetical tunnel through space-time that would allow instantaneous intergalactic travel to the most distant galaxies even billions of light years away.

  3. Uncrewed spacecraft - Wikipedia

    en.wikipedia.org/wiki/Uncrewed_spacecraft

    A space probe is a robotic spacecraft that does not orbit Earth, but instead, explores further into outer space. Space probes have different sets of scientific instruments onboard. A space probe may approach the Moon; travel through interplanetary space; flyby, orbit, or land on other planetary bodies; or enter interstellar space.

  4. 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 ...

  5. Space exploration - Wikipedia

    en.wikipedia.org/wiki/Space_exploration

    Space exploration also gives scientists the ability to perform experiments in other settings and expand humanity's knowledge. [67] Another claim is that space exploration is a necessity to humankind and that staying on Earth will eventually lead to extinction. Some of the reasons are lack of natural resources, comets, nuclear war, and worldwide ...

  6. Space colonization - Wikipedia

    en.wikipedia.org/wiki/Space_colonization

    Space colonization is the process of establishing human settlements beyond Earth for prestige, commercial or strategic benefit, [2] in contrast to space exploration for scientific benefit. Colonialism in this sense is multi-dimensional, including the exploitation of labor, resources and rights.

  7. Fermi paradox - Wikipedia

    en.wikipedia.org/wiki/Fermi_paradox

    This is an accepted version of this page This is the latest accepted revision, reviewed on 24 December 2024. Problem of the lack of evidence for alien life despite its apparent likelihood This article is about the absence of clear evidence of extraterrestrial life. For a type of estimation problem, see Fermi problem. Enrico Fermi (Los Alamos 1945) The Fermi paradox is the discrepancy between ...

  8. Interplanetary spaceflight - Wikipedia

    en.wikipedia.org/wiki/Interplanetary_spaceflight

    Space colony on the O'Neill cylinder. The costs and risk of interplanetary travel receive a lot of publicity—spectacular examples include the malfunctions or complete failures of probes without a human crew, such as Mars 96, Deep Space 2, and Beagle 2 (the article List of Solar System probes gives a full list).

  9. Interstellar travel - Wikipedia

    en.wikipedia.org/wiki/Interstellar_travel

    A Bussard ramjet, one of many possible methods that could serve to propel spacecraft. Interstellar travel is the hypothetical travel of spacecraft between star systems.Due to the vast distances between the Solar System and nearby stars, interstellar travel is not practicable with current propulsion technologies.