Dictionary of Space Concepts
What is the Dictionary of Space Concepts?
The Dictionary of Space Concepts (DSC) is a project by UNIVERSEH – the European Space University of Earth and Humanity. Starting in 2020, this Alliance of five European Universities decided to launch an online dictionary dealing with terms and concepts related to space sciences. It should be created and used by students, lecturers, researchers and citizens alike.
After an initial planning phase, the DSC was published in spring 2022. It opens up several opportunities for all members of the UNIVERSEH Alliance and interested citizens to contribute to the content of the DSC.
In our course "Terms and Concepts of Space" (to the registration) , students learn how to write a dictionary article and later on contribute several entries to the DSC. Students and other members of the UNIVERSEH Alliance can also submit articles for the DSC via an entry in here . Interested citizens can contribute in this entry platform.
Once submitted, these articles are reviewed by UNIVERSEH Alliance staff and, if necessary, edited before their publication in the Dictionary.
In this way, the DSC is a dynamic project that is constantly expanding in content and quality through constant contributions from students, staff and citizens.
Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL
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Expansion of the universe | |||
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Image/Video/Audio Source: https://en.wikipedia.org/wiki/Expansion_of_the_universe#/media/File:CMB_Timeline300_no_WMAP.jpg
Short Definition: The expansion of the universe is a phenomenon, which describes the
inherent property of the universe, where two galaxies that are gravitationally unbound
tend to increase the distance to each other and the rate of expansion is even accelerating.
Far away parts of the observable universe will not be observable in the near
future, because the velocity of expansion is higher than light speed from an
outside perspective.
Detailed Definition: The expansion of the universe is a phenomenon, which explains an inherent property of the universe to expand. The fact that the universe seems to expand, was first doubted because of the gravitational force and the fact that releases of energy like the big bang should normally lose power and should slow over time, but the opposite was observed. The elusive culprit was found quite fast. Dark matter is to be responsible for this phenomenon, but since we know even less about dark matter than about the expansion of the universe, details of how and why it expands are still unknown. This expansion occurs at
every location of the universe and only gravitationally bound galaxies will be
able to observe each other, because unbound galaxies will escape our observable
universe at some point. The expansion can in some way be compared to an elastic
rubber band, where the distances also increase when you stretch it, but not
literally and not on a human scale. It is more that at a scale so far zoomed
out, that the universe looks like a cosmic fluid and at this scale it is apparent
that the density is decreasing over time. There are three viable methods to
measure this expansion. One is based on redshifts, while another on the cosmic
distance ladder. Those measurements gave non-matching results, and so 2018 information
from gravitational waves made it possible to determine the rate of expansion
even more precisely.
Etymology:
Expansion à from Latin expandere à spread out Universeà from Old French univers à from Latin universumSample Sentence(s):
In a thought experiment of an ascending civilization in a faraway galaxy in the far future, they would only be able to observe their neighbouring galaxies and will think that this is all there is to the universe and all this due to an expansion of the universe. The rate of expansion of the universe is thought to be accelerating. French: Expansion de l'universGerman: Ausdehnung des Universums
Polish: Ekspansja Wszechświata Swedish: Utvidgning av universum
Links to Videos/Articles:
Expansion of the universe - Wikipedia | |||