Definitions of bodies in the solar system

Dwarf Planet Candidate 2015 RR245 is in a fairly distant orbit, but is one of the few dwarf planets that can be visited by the New Horizons spacecraft. . Alex Parker/OSSOS, CC BY-SA

840 dwarf planets discovered beyond Neptune-Rahab - and what they can tell us

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Artist's illustration of the landscape on the dwarf planet Sedna. David Gerdes of the University of Michigan says the surface of 2014 UZ224 will look similar.

A new dwarf planet has been discovered at the edge of the solar system

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New Evidence The gravity of a putative planet, dubbed Planet Nine, may explain oddities in the orbits of two groups of objects that lie beyond Pluto. (Figure produced using Worldwide Telescope, Caltech/R. Hart (IPAC))

The search for planet X

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Illustration of the orbit of the dwarf planet RR245 (orange line), image: Alex Parker, OSSOS team

A dwarf planet has been discovered far beyond Pluto's orbit

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This artist's illustration shows the possible appearance of the ninth planet from the Sun, which is likely to be composed mostly of gases similar to Uranus and Neptune. Hypothetical lightning illuminates the night side. Illustration: Caltech

Indirect evidence for the existence of a ninth planet: a gas giant that orbits the Sun once every ten thousand years

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Comparing the size of Earth and Mars on the same scale. Image: NASA

Why is Earth bigger than Mars?

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A comet is approaching the sun. Image: NASA

Is a giant planet at the edge of the solar system responsible for some of the comets?

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The planet Oron. Photo: Voyager 2

Uranus is from today Oron and Neptune from now on Rahab

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2012: There Is No Planet X (Nibiru)

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A new body in the solar system has been named: the Umeya dwarf planet

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The World Astronomical Union throws Pluto a bone - it and the trans-Neptunian bodies will be called plutoids

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The number of planets in the solar system - does it really matter how much?

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Were the changes in the definitions of the planets essential and how much their contribution affects the space sciences
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Prof. Zvi MZA/The struggle for Pluto as a planet

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New solar system(?)

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In a flash - Pluto is still a planet

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Astronomers challenge the decision to downgrade Pluto and call it a hijacker

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"Many tearful eyes" at the IAU conference in Prague where it was decided to demote Pluto

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The strict ones won - Pluto loses its status as a planet and becomes a 'dwarf planet'

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Today the vote on the definition of the planets in the solar system * Proposal: adding the atmosphere as a criterion

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"The very definition takes the magic out of the planets"

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Eight stars?

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12 Kochbia: the sequence of decisions regarding the determination of the definition of the planets

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Changing the maps: the solar system will expand to 12 stars

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Commentary: Has Pluto degradated or not?

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There is a compromise in which the number of planets will increase to 12 and a waiting list of additional bodies will be opened

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3,000 astronomers are currently meeting in Prague to discuss the fate of Pluto

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Pluto's status as a planet will soon be decided

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Nine planets? No longer!

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Terrestrial planets, gas giants and ex-Neptunian planets instead of just planets

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Planets in Planter

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A rare grouping of planets and a comet

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Pluto is not suitable

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How come a star is demoted

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The scientist - archive: 19.5 billion km from the sun

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