To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

From Wikipedia, the free encyclopedia

Mesoplanets are planetary-mass objects with sizes smaller than Mercury but larger than Ceres. The term was coined by Isaac Asimov. Assuming size is defined in relation to equatorial radius, mesoplanets should be approximately 500 km to 2,500 km in radius.

YouTube Encyclopedic

  • 1/2
    Views:
    54 203
    21 307
  • PLANETËT - Sistemi diellor për fëmijë
  • Solar System Planets and Dwarf Planets Size Comparison Zoom-Out and Zoom-In | Algodoo

Transcription

History

The term was coined in Asimov's essay "What's in a Name?", which first appeared in the Los Angeles Times in the late 1980s[1] and was reprinted in his 1990 book Frontiers;[2] the term was later revisited in his essay, "The Incredible Shrinking Planet" which appeared first in The Magazine of Fantasy and Science Fiction[3] and then in the anthology The Relativity of Wrong (1988).[4]

Asimov noted that the Solar System has many planetary bodies (as opposed to the Sun and natural satellites) and stated that lines dividing "major planets" from minor planets were necessarily arbitrary. Asimov then pointed out that there was a large gap in size between Mercury, the smallest planetary body that was considered to be undoubtedly a major planet, and Ceres, the largest planetary body that was considered to be undoubtedly a minor planet. Only one planetary body known at the time, Pluto, fell within the gap. Rather than arbitrarily decide whether Pluto belonged with the major planets or the minor planets, Asimov suggested that any planetary body that fell within the size gap between Mercury and Ceres be called a mesoplanet, because mesos means "middle" in Greek.

... my own suggestion is that everything from Mercury up be called a major planet; everything from Ceres down be called a minor planet; and everything between Mercury and Ceres be called a "mesoplanet" (from a Greek word for "intermediate"). At the moment, Pluto is the only mesoplanet known. — I. Asimov (1988)[4]

Today, the known objects that would be included by this definition are Pluto, Eris, Haumea, Makemake, Gonggong, Quaoar, probably Sedna, and perhaps Orcus. These eight, together with Ceres, are the objects astronomers generally agree are dwarf planets (though with some doubt regarding Orcus); other smaller bodies have been proposed, but astronomers disagree about their dwarf planethood.

See also

References

  1. ^ Jenkins, John H. "Frontiers: New Discoveries About Man and His Planet, Outer Space, and the Universe". Asimov Reviews. Retrieved 29 July 2015.
  2. ^ Asimov, Isaac (March 29, 1990). Frontiers: New Discoveries About Man and His Planet, Outer Space, and the Universe. Dutton Adult. ISBN 0525246622.
  3. ^ Asimov, Isaac (March 1987). "The Incredible Shrinking Planet". The Magazine of Fantasy and Science Fiction. pp. 118–128.
  4. ^ a b Asimov, Isaac (1988). The Relativity of Wrong. p. 121.
This page was last edited on 6 February 2024, at 15:11
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.