«But it fits in perfectly with our understanding of how this remarkable
dwarf planet formed.»
All the emotive controversy about whether Pluto is a planet or
a dwarf planet strikes me as puerile.
is not happy with the reclassification of Pluto as
a dwarf planet.
The Hubble Space Telescope has provided the clearest images yet of
this dwarf planet for scientists to study.
Features on
dwarf planet Ceres that piqued the interest of scientists throughout 2015 stand out in exquisite detail in the latest images from NASA's Dawn spacecraft.
The New Horizons spacecraft finally spied
the dwarf planet's two tiniest satellites, Kerberos and Styx, in a series of images taken from April 25 to May 1, when the probe was nearly 90 million kilometers from Pluto.
Observations revealed that Pluto manages to hold on to much of the gas around it, but some still escapes
the dwarf planet's grasp.
In August 2006 the International Astronomical Union officially demoted Pluto, putting it into the new category of «
dwarf planet,» a sun - orbiting object big enough to be forced into a spherical shape by gravity but not big enough to clear its own orbit.
The images were taken when the probe was about 50 million kilometers from
the dwarf planet and its largest satellite.
And the International Astronomical Union's demotion of Pluto from planet to
dwarf planet status in 2006 seemed to make it even more interesting to the public.
The largest, Ceres, is 600 miles wide and is now considered
a dwarf planet.
Although Kuiper belt objects are not the main quarry of Spacewatch, the project's astronomers did find 560 - mile - wide Varuna,
a dwarf planet candidate.
On July 14, NASA's New Horizons spacecraft will reach
the dwarf planet and try to learn all it can about Pluto and its five known moons.
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.
A stunning image of
the dwarf planet in silhouette, released July 24, reveals a layer of haze extending...
Pluto's four outermost moons whirl around
the dwarf planet in these images from the New Horizons spacecraft.
At 8:52:37 p.m. Eastern time, a radio antenna near Madrid received the first signal from the spacecraft since it buzzed
the dwarf planet.
When New Horizons made its historic flyby of Pluto, it also studied the moons around
the dwarf planet.
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.
This is Ceres,
the dwarf planet that Dawn's been orbiting for more than a year now, providing us with fascinating views of an alien world.
Lissauer says he and his textbook co-author limited their use of the term
dwarf planet because of such caveats.
Scientists evaluated the geology of the regions to conclude that the organics are most likely native to
the dwarf planet.
Dawn scientists will continue to study
the dwarf planet to identify a viable method for transporting such material from the interior to the surface in the pattern observed.
Many of them put up a fuss two years ago when the International Astronomical Union (IAU) downgraded Pluto to the status of mere
dwarf planet.
«Geology of Ceres illuminates origin of organics: Dawn spacecraft data suggest organic materials are native to
the dwarf planet.»
The discovery of a small moon orbiting the third - largest
dwarf planet means all the large objects orbiting beyond Neptune have satellites.
In 2006, the International Astronomical Union stripped Pluto of its title and rechristened it a «
dwarf planet.»
Over billions of years,
the dwarf planet could have acquired a thick shroud of shrapnel.
Mike Brown of the California Institute of Technology in Pasadena, whose discovery of
dwarf planet Eris led to Pluto's demotion, is upbeat: «Even objects that are not planets are interesting and have things about them yet to be discovered.»
The pictures, taken when New Horizons was about 13 million kilometers from
the dwarf planet, show three different swaths of the icy surface as Pluto slowly rotated on its axis.
It is more than half as wide as Pluto itself, so large that the pair is more properly described as a double planet — or a double
dwarf planet, or double Kuiper Belt Object, or whatever astronomers decide to call it next.
In Neil deGrasse Tyson «s new book The Pluto Files (read our review), he reproduces a selection of angry letters complaining about the decision to reclassify Pluto as a «
dwarf planet», rather than a true planet.
This makes
it a dwarf planet, one of five officially recognised in the solar system.
It travels around Pluto in a 95,000 - kilometre - wide orbit in the same plane as the other moons in
the dwarf planet's entourage — Charon, a 1200 - kilometre - wide beast of a moon, Nix, Hydra and the recently discovered P4.
These objects range in size from specks of debris dust, all the way up to moon - sized objects like Pluto — which used to be classified as a planet, but has now been reclassified as
a dwarf planet.
For such a small planet — sorry,
dwarf planet — Pluto caused a big uproar this year.
Last July, NASA's New Horizons spacecraft swooped near Pluto, snapping the first close - ups ever taken of
the dwarf planet's surface.
That haze affects surface features such as
the dwarf planet's red patches, a new study suggests.
Haze particles from
the dwarf planet's atmosphere settle onto all of Pluto's surfaces.
When the New Horizons spacecraft flew past Pluto in 2015, scientists weren't expecting to see haze reaching at least 200 kilometers above
the dwarf planet's surface; nor were they expecting to see the haze divided into about 20 delicate and distinct layers -LRB-
Orbiting Ceres since 2015, the Dawn spacecraft picked up hints of organic material on
the dwarf planet's surface, researchers reported in February — a sign that Ceres may have once had a habitable environment.
Brown first achieved notoriety for the discovery of Eris, a distant object nearly the size of Pluto, which led to
the dwarf planet's demotion.
Some scientists believe
the dwarf planet harbored a subsurface ocean in the past and liquid water may still be lurking under its icy mantle.
Astronomers promptly reclassified Pluto as
a dwarf planet — a saga Brown recounted in his book How I Killed Pluto.
This animation of
the dwarf planet Ceres was made by combining images taken by the Dawn spacecraft on January 25, 2015.
The mysterious bright spot on
the dwarf planet Ceres has been revealed in its highest resolution yet, and the bright materials in it appear to be coming from a fractured dome — a possible portal to icy materials in the subsurface.
Hubble images also had glimpsed a white spot on
the dwarf planet, but its nature is still unknown.
If the early results hold up, this time it's
the dwarf planet Eris's turn to be demoted, and Pluto might have just regained its status as the largest object in the Kuiper Belt, the ring of icy bodies beyond Neptune.
Originally described as a planet, Ceres was later categorized as an asteroid, and then reclassified as
a dwarf planet in 2006.
Based on the nitrogen, methane and carbon monoxide in Pluto's atmosphere, scientists predicted
the dwarf planet's upper atmosphere would be a brisk — 173 ° Celsius.