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  2. Human presence in space - Wikipedia

    en.wikipedia.org/wiki/Human_presence_in_space

    Human presence in outer space began with the first launches of artificial object in the mid 20th century, and has increased to the point where Earth is orbited by a vast number of artificial objects and the far reaches of the Solar System have been visited and explored by a range of space probes.

  3. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    From largest to smallest: Jupiter's orbit, red supergiant star Betelgeuse, Mars' orbit, Earth's orbit, star R Doradus, and orbits of Venus, Mercury. Inside R Doradus's depiction are the blue supergiant star Rigel and red giant star Aldebaran. The faint yellow glow around the Sun represents one light-minute.

  4. List of largest cosmic structures - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_cosmic...

    List of the largest voids Void name/designation Maximum dimension (in light-years) Notes LOWZ North 13788 void: 2,953,000,000: One of largest known voids, containing 109,066 known galaxies. [29] Local Hole: 2,000,000,000: Proposed void containing the Milky Way galaxy and Local Group as an explanation for the discrepancy in the Hubble constant ...

  5. List of Solar System objects by size - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System...

    The largest of these may have a hydrostatic-equilibrium shape, but most are irregular. Most of the trans-Neptunian objects (TNOs) listed with a radius smaller than 200 km have " assumed sizes based on a generic albedo of 0.09" since they are too far away to directly measure their sizes with existing instruments.

  6. Astronomers discover 'largest structure in the universe' - AOL

    www.aol.com/news/2011-01-01-astronomers-discover...

    The group discovered the unfathomable supervoid that is 1.8 billion light-years across, according to Sky News.A section of space of that size would typically house 10,000 galleries.

  7. Jupiter, ascending: See our solar system’s biggest planet at ...

    www.aol.com/jupiter-ascending-see-solar-system...

    People around the world will have a chance this weekend to catch what could be the year’s most stunning view of the largest planet in our solar system.

  8. Scientists find a 'next step on a pathway to life' in space

    www.aol.com/news/scientists-next-step-pathway...

    “We have discovered that next step on a pathway to life.” This mosaic image of asteroid Bennu, was taken on December 2, 2018 by the OSIRIS-REx spacecraft from a range of 15 miles.

  9. Expansion of the universe - Wikipedia

    en.wikipedia.org/wiki/Expansion_of_the_universe

    The universe at the largest scales is observed to be homogeneous (the same everywhere) and isotropic (the same in all directions), consistent with the cosmological principle. These constraints demand that any expansion of the universe accord with Hubble's law , in which objects recede from each observer with velocities proportional to their ...