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  2. How the Universe Works - Wikipedia

    en.wikipedia.org/wiki/How_the_Universe_Works

    The third season aired between July 9 and September 3, 2014. [8] The fourth season premiered on July 14, 2015, as part of the Science Channel's "Space Week," in honor of New Horizons' flyby of Pluto that day; the season ran through September 1, 2015. The show's fifth season aired from November 22, 2016, through February 7, 2017. The sixth ...

  3. List of hypothetical Solar System objects - Wikipedia

    en.wikipedia.org/wiki/List_of_hypothetical_Solar...

    Theia or Orpheus, [21] a Mars-sized impactor believed to have collided with the Earth roughly 4.5 billion years ago; an event which created the Moon. Evidence from 2019 suggests that it may have originated in the outer Solar System. [22] Vulcan, a hypothetical planet once believed to exist inside the orbit of Mercury. Initially proposed as the ...

  4. Rotation period (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Rotation_period_(astronomy)

    Rotation period with respect to distant stars, the sidereal rotation period (compared to Earth's mean Solar days) Synodic rotation period (mean Solar day) Apparent rotational period viewed from Earth Sun [i] 25.379995 days (Carrington rotation) 35 days (high latitude) 25 d 9 h 7 m 11.6 s 35 d ~28 days (equatorial) [2] Mercury: 58.6462 days [3 ...

  5. Seasons on planets - Wikipedia

    en.wikipedia.org/wiki/Seasons_on_planets

    Given the different Sun incidence in different positions in the orbit, it is necessary to define a standard point of the orbit of the planet, to define the planet position in the orbit at each moment of the year w.r.t such point; this point is called with several names: vernal equinox, spring equinox, March equinox, all equivalent, and named considering northern hemisphere seasons.

  6. Discovery of Neptune - Wikipedia

    en.wikipedia.org/wiki/Discovery_of_Neptune

    Made by the late Joseph Fraunhofer's firm, Merz und Mahler, it was a high-performance telescope of its era, with one of the largest achromatic doublets available and a finely made equatorial mount, with a clock drive to move the 4 m (13.4′) main tube at the same rate as Earth's rotation.

  7. Despina (moon) - Wikipedia

    en.wikipedia.org/wiki/Despina_(moon)

    Despina's diameter is approximately 150 kilometres (93 mi). [4] Despina is irregularly shaped and shows no sign of any geological modification. It is likely that it is a rubble pile re-accreted from fragments of Neptune's original satellites, which were disrupted by perturbations from Triton soon after that moon's capture into a very eccentric initial orbit.

  8. TV Premiere Dates 2023: The Full List of Shows - AOL

    www.aol.com/tv-premiere-dates-2023-full...

    With the era of peak TV showing no signs of slowing down in 2023, ET has put together a comprehensive list of all the upcoming premiere dates for major series -- both new and returning -- across ...

  9. Earth (2023 TV series) - Wikipedia

    en.wikipedia.org/wiki/Earth_(2023_TV_series)

    Earth is a 2023 miniseries presented by Chris Packham, produced by BBC Studios with NOVA and GBH Boston for the BBC and PBS, in partnership with the Open University. It consists of five one-hour episodes. [1] [2] Although a nature documentary, a significant part of the series is made with CGI featuring Chris Packman narrating with voiceovers ...