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1 dzień temu · On July 20, 1999, Space.com opened its doors to chronicle humanity's ongoing mission to understand the cosmos and explore the final frontier. A lot has happened in astronomy and spaceflight over ...
4 dni temu · This is a timeline of space exploration which includes notable achievements, first accomplishments and milestones in humanity's exploration of outer space. This timeline generally does not distinguish achievements by a specific country or private company, as it considers humanity as a whole.
5 dni temu · 45 Years Ago: Skylab Reenters Earth’s Atmosphere. A few days before they left Skylab on Feb. 8, 1974, the final crew to occupy the station raised its altitude, hoping to keep it in orbit until a future space shuttle could revisit it. But higher than predicted solar activity caused the Earth’s atmosphere to expand, increasing drag on the ...
2 dni temu · The spherical volume of space which will become the observable universe is 42 million light-years in radius at this time. The baryonic matter density at this time is about 500 million hydrogen and helium atoms per m 3 , approximately a billion times higher than today.
5 dni temu · Also known as NGC 5139, at a distance of 15,000 light-years it's the largest and brightest of 200 or so known globular clusters that roam the halo of our Milky Way galaxy.
4 dni temu · This cluster is more than seven billion light-years from Earth and provides an image of the universe in its youth. The colour of the galaxies is a product of redshift. This cluster was observed by the Hubble Space Telescope.
5 dni temu · Discover the history of NASA, including our human spaceflight, science, technology, and aeronautics programs, and explore the NASA History Office's publications and oral histories.
