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Vor einem Tag · From studying the effects of gravity on both matter and light, it has been discovered that the universe contains much more matter than is accounted for by visible objects; stars, galaxies, nebulas and interstellar gas.
- 13.787 ± 0.020 billion years
- At least 10⁵³ kg
- 9.9×10−27 kg/m³
Vor einem Tag · The speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour).
- 1,1B
- 671M
- 299,8M
- 186K
27. Apr. 2024 · Hermann Minkowski (1864–1909) found that the theory of special relativity could be best understood as a four-dimensional space, since known as the Minkowski spacetime. In mathematical physics, Minkowski space (or Minkowski spacetime) ( / mɪŋˈkɔːfski, - ˈkɒf -/ [1]) combines inertial space and time manifolds with a non ...
Vor 4 Tagen · Die Internationale Raumstation ( englisch International Space Station, kurz ISS, russisch Междунаро́дная косми́ческая ста́нция (МКС), Meschdunarodnaja kosmitscheskaja stanzija (MKS)) ist die bislang größte und langlebigste Raumstation der Menschheit. Zunächst als militärische Station von den USA geplant ...
22. Apr. 2024 · Early telescopes focused light using pieces of curved, clear glass, called lenses. However, most telescopes today use curved mirrors to gather light from the night sky. The shape of the mirror or lens in a telescope concentrates light. That light is what we see when we look into a telescope.
22. Apr. 2024 · For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it!
23. Apr. 2024 · This chapter focuses on two topical issues which threaten the future of ground-based astronomy and space science. They are the plans to launch tens of thousands of low Earth orbit (LEO) satellites by a number of companies, including SpaceX and OneWeb, for global internet communications.
