Not exact matches
Ceres is a
dwarf planet,
as well as an asteroid.
After years of scrutinizing the closest star to Earth, a red
dwarf known
as Proxima Centauri, astronomers have finally found evidence for a
planet, slightly bigger than Earth and
well within the star's habitable zone — the range of orbits in which liquid water could exist on its surface.
[1] The team used data from the UVES spectrograph on ESO's Very Large Telescope in Chile (to determine the properties of the star accurately), the Carnegie
Planet Finder Spectrograph (PFS) at the 6.5 - metre Magellan II Telescope at the Las Campanas Observatory in Chile, the HIRES spectrograph mounted on the Keck 10 - metre telescope on Mauna Kea, Hawaii
as well as extensive previous data from HARPS (the High Accuracy Radial velocity
Planet Searcher) at ESO's 3.6 - metre telescope in Chile (gathered through the M
dwarf programme led by X. Bonfils and M. Mayor 2003 - 2010.
One amendment would have left its status open to debate by creating two categories of
planets — the eight «classical
planets»
as well as «
dwarf planets» — that might have seemed to be on equal footing.
Gas - giant
planets more massive than Jupiter —
as well as «failed stars» called brown
dwarfs — should conversely have much shallower winds.
After all, we are talking about all the stars
as well as planets, comets, moons, the Crab nebula, black holes, brown
dwarfs, the Pacific Ocean, you, me, cans of soup, and the family dog — all of it.
After years of scrutinizing the closest star to Earth, a red
dwarf known
as Proxima Centauri, astronomers have finally found evidence for a
planet, slightly bigger than Earth,
well within the star's habitable zone — the range of orbits in which liquid water could exist on its surface.
Astronomers using the TRAPPIST - South telescope at ESO's La Silla Observatory, the Very Large Telescope (VLT) at Paranal and the NASA Spitzer Space Telescope,
as well as other telescopes around the world [1], have now confirmed the existence of at least seven small
planets orbiting the cool red
dwarf star TRAPPIST - 1 [2].
New work led by Carnegie's Jacqueline Faherty surveyed various properties of 152 suspected young brown
dwarfs in order to categorize their diversity and found that atmospheric properties may be behind much of their differences, a discovery that may apply to
planets outside the solar system
as well.
The first result, released September 10, is a stunning, crisp mosaic of Pluto from the spacecraft's visit on July 14
as well as a closer look at the
dwarf planet's largest moon, Charon.
Pluto and Charon might have been the stars of the New Horizons mission, but the
dwarf planet's four smaller moons have some surprises to share
as well.
With its Long Range Reconnaissance Imager (LORRI), New Horizons has observed several Kuiper Belt objects (KBOs) and
dwarf planets at unique phase angles,
as well as Centaurs at extremely high phase angles to search for forward - scattering rings or dust.
It is being referred to
as the ninth
planet, since poor Pluto had been demoted to
dwarf planet status, leaving only eight «real»
planets, which does not sit
well with a lot of people who still believe that Pluto should be classified
as a proper
planet, not just a mini-version of one.
I can't get Andreeshchev and Scalo's diagram reproduced
well enough to display
well here, but they study the duration of residence in the evolving habitable zone
as a function of the
planet's distance from the brown
dwarf, assuming a circular orbit.
In addition, the presence of water has been confirmed even in the most unlikely of places, like the permanently shadowed crates at the south poles of Mercury and the Earth's Moon,
as well as on
dwarf planets like Ceres, providing a paradigm shift in our views about the prevalence of this all - important molecule in our planetary backyard.
And the
dwarf planet's color surprised some
as well.
DAWN will spend roughly a year orbiting Vesta before moving on to Ceres, an IAU - designated «
dwarf planet»
as well as the largest Main - Belt asteroid (NASA / JPL press release and image release; NASA science news; Jonathan Amos, BBC News, July 14, 2011; and Nancy Atkinson, Universe Today, July 14, and July 7, 2011).
MARVELS is predicted to discover around a hundred new giant
planets,
as well as potentially finding a similar number of «brown
dwarfs» that are intermediate between the most massive
planets and the smallest stars.