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Space exploration is the use of astronomy and space technology to explore outer space. [1] While the exploration of space is currently carried out mainly by astronomers with telescopes, its physical exploration is conducted both by uncrewed robotic space probes and human spaceflight.
In doing so, Elon Musk’s company took a major step toward commercializing those capabilities. It marked the first time a private mission to space attempted such an endeavor.
In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time.In Albert Einstein's 1905 paper, On the Electrodynamics of Moving Bodies, the theory is presented as being based on just two postulates: [p 1] [1] [2]
Debates concerning the nature, essence and the mode of existence of space date back to antiquity; namely, to treatises like the Timaeus of Plato, or Socrates in his reflections on what the Greeks called khôra (i.e. "space"), or in the Physics of Aristotle (Book IV, Delta) in the definition of topos (i.e. place), or in the later "geometrical conception of place" as "space qua extension" in the ...
The closest thing the space agency has today to the Saturn 5 is the Space Launch System (SLS), the massive rocket designed to be used in the Artemis program, which aims to have American astronauts ...
The legacy of the space race is that nations continue to pursue space exploration to enhance their prestige. [2] As the justification for government-funded space programs shifted to "the public good", space agencies began to articulate and measure the wider socio-economic benefits that might derive from their activities, including both the ...
From space tourists taking a brief suborbital flight around the Earth to human beings flying to Mars, the next few decades look particularly exciting for space fanatics, thanks to the vision ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 20 January 2025. 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 ...