This telescope and its NACO instrument has discovered more directly imaged exoplanetary systems and
planetary mass objects than any other telescope in the world.
This is the first known example of a gravitationally bound pair of
planetary mass objects, and astronomers can't agree on a name for them.
Jayawardhana calls them planemos (for «
planetary mass objects»).
Using evolution models, this translates into
a planetary mass object, with an age in the 20 - 200 Myr range.
However, many others argue that only planemos that directly orbit stars should qualify as planets, preferring to use the terms «planetary body,» «
planetary mass object» or «planemo» for similar free - floating objects (as well as planet - size moons).
Not exact matches
Led by Renu Malhotra, a Regents» Professor of
Planetary Sciences in the UA's Lunar and
Planetary Lab, the team found that the four Kuiper Belt
Objects with the longest known orbital periods revolve around the Sun in patterns most readily explained by the presence of a hypothetical «Planet Nine» approximately ten times the
mass of Earth.
«WISE 0855 is our first opportunity to study an extrasolar
planetary -
mass object that is nearly as cold as our own gas giants,» Skemer said.
«It is quite possible that not only brown dwarfs are still hiding in the observational data, but also other
objects with even smaller,
planetary - like
masses.
«New low -
mass objects could help refine
planetary evolution.»
A new study has found that one of the nearest brown dwarfs to our Solar System, designated SIMP J013656.5 +093347 (SIMP0136 for short), might actually be a
planetary -
mass object.
Though our best fit corresponds to a brown dwarf of 15 - 30 MJup aged 100 - 300 Myr, our analysis is also compatible with a range of
masses and ages going from a 50 Myr 12MJup
planetary -
mass object to a 50 MJup Hyades - age brown dwarf... △ Less
Once more massive and brighter than Gacrux and so burnt out much faster, it is now probably a few hundred times fainter than Sol, with 0.6 to 1.4 times its
mass and less than one percent of its diameter — a very dense
object at
planetary size.
An analysis of the data indicated the presence of 10 times the amount of brown dwarfs and very - low -
mass planetary objects than would be expected in line with current theories on star formation in the nebula.
Occasionally these
objects look something like
planetary nebulae, as in the case of the Crab Nebula, but they differ from the latter in three ways: (1) the total
mass of their gas (they involve a larger
mass, essentially all the
mass of the exploding star), (2) their kinematics (they are expanding with higher velocities), and (3) their lifetimes (they last for a shorter time as visible nebulae).
«This would have been the first ever
planetary -
mass binary, making our
object even more of an oddity,» said Étiene Artigau, co-supervisor of Naud's thesis and astrophysicist at the Université de Montréal.
In order to be recognized as such, an
object must orbit the Sun but can not be a satellite (like a moon), must have enough
mass to be spherical, and has not cleared its
planetary neighborhood of debris.
Based on the duo's calculation, they determined that a Mars -
mass planetary object located approximately 60 AU from the sun, with an orbital tilt of eight degrees, would have enough gravitational influence to warp the orbital plane of distant KBOs by around 10 AU to either side.
Abstract: Based on more than four weeks of continuous high cadence photometric monitoring of several hundred members of the young cluster NGC 2264 with two space telescopes, NASA's Spitzer and the CNES CoRoT (Convection, Rotation, and
planetary Transits), we provide high quality, multi-wavelength light curves for young stellar
objects (YSOs) whose optical variability is dominated by short duration flux burs... ▽ More Based on more than four weeks of continuous high cadence photometric monitoring of several hundred members of the young cluster NGC 2264 with two space telescopes, NASA's Spitzer and the CNES CoRoT (Convection, Rotation, and
planetary Transits), we provide high quality, multi-wavelength light curves for young stellar
objects (YSOs) whose optical variability is dominated by short duration flux bursts, which we infer are due to enhanced
mass accretion rates.
A volcano is a rupture in the crust of a
planetary -
mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber Evolutionists have long used the carbon - 14, or radiocarbon, dating technique as a «hammer» to bludgeon Bible - believing Christians.