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Some critics have pointed out the hazards of space debris which affect satellites, spacecraft and the surface of the Earth. For example, in March 2009 debris believed to be a 10 cm (3.9 in) piece of the Kosmos 1275 satellite nearly hit the ISS. [37] Although it is relatively rare for people on the ground to be hit by space debris, it does happen.
The term "astroecology" was first applied in the context of performing studies in actual meteorites to evaluate their potential resources favorable to sustaining life. [1] Early results showed that meteorite/asteroid materials can support microorganisms, algae and plant cultures under Earth's atmosphere and supplemented with water.
Understanding planetary habitability is partly an extrapolation of the conditions on Earth, as this is the only planet known to support life.. Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and maintain an environment hospitable to life. [1]
Early photos of Earth taken from space have inspired a mild version of the overview effect in earthbound viewers. [1] The images became prominent symbols of environmental concern and have been credited for raising the public's consciousness about the fragility of Earth and expanding concern for long-term survival on a finite planet. [1]
This interdisciplinary field encompasses research on the origin of planetary systems, origins of organic compounds in space, rock-water-carbon interactions, abiogenesis on Earth, planetary habitability, research on biosignatures for life detection, and studies on the potential for life to adapt to challenges on Earth and in outer space.
This is an accepted version of this page This is the latest accepted revision, reviewed on 9 February 2025. Hypothesis about life in the universe For the concept of a fine-tuned Earth, see Rare Earth hypothesis. Part of a series on Physical cosmology Big Bang · Universe Age of the universe Chronology of the universe Early universe Inflation · Nucleosynthesis Backgrounds Gravitational wave ...
From planetary meet-ups to the first total lunar eclipse in three years, here are the top astronomy events to look for throughout 2025: Stellar views of Mars will greet stargazers in January as ...
Deep-space exploration is the branch of astronomy, astronautics, and space technology that is involved with exploring the distant regions of outer space. [1] However, little consensus has been reached on the meaning of "distant" regions. In some contexts, it is used to refer to interstellar space.