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One of Jupiter's stripes that faded out making a comeback

New NASA images show that one of Jupiter's dark brown stripes that disappeared last spring is now showing signs of a comeback.
These new observations will help scientists better understand the interaction between Jupiter's winds and cloud chemistry.

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Jupiter gets its stripe back

One of Jupiter's dark brown stripes that faded out last spring is regaining its colour, providing an unprecedented opportunity for astronomers to observe a rare and mysterious phenomenon caused by the planet's winds and cloud chemistry.
Earlier this year, amateur astronomers noticed that the long-standing stripe, known as the South Equatorial Belt (SEB), just south of Jupiter's equator, had turned white. In early November, amateur astronomer Christopher Go of Cebu City in the Philippines observed a prominent bright spot in the unusually whitened belt, piquing the interest of professional and amateur astronomers around the world.

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what is the 9th planet?????

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Footage captured by an amateur astronomer in Japan shows a large flash as astral matter impacts on the planet Jupiter.

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Jupiter swallowed a super-Earth

Spacecraft-based gravity measurements suggest Jupiter's core weighs just two to 10 Earth masses, while Saturn's comes in at 15 to 30.
New simulations by Shu Lin Li of Peking University in China, and colleagues, may explain why. They calculated what would happen when a super-Earth of 10 times the mass of our planet slammed into a gas giant. The rocky body flattened like a pancake when it hit the gas giant's atmosphere, then barrelled into the giant's core about half an hour later. The energy of the collision could have vaporised much of the core.

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Title: Changes in the Cloud Belts of Jupiter, 1630-1664, as reported in the 1665 Astronomia Reformata of Giovanni Battista Riccioli
Authors: Christopher M. Graney

A translation of a section from the 1665 Astronomia Reformata of G. B. Riccioli discussing the appearance of the disk of Jupiter during the years 1630-1664; changes in the Jovian cloud belts as recorded by a variety of observers are a major feature of Riccioli's discussion.

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Jupiter in the constellation Pisces, 0.00 UT, 1st August, 2010.

Magnitude=-2.7mag  
Best seen from 22.7h - 5.3h
RA= 0h13m46s  Dec= -0°04.5' (J2000)
Distance=4.307AU
Elongation=125° 
Diameter=45.7"

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Title: The Deep Water Abundance on Jupiter: New Constraints from Thermochemical Kinetics and Diffusion Modeling
Authors: Channon Visscher, Julianne I. Moses, Sarah A. Saslow
(Version v2)

We have developed a one-dimensional thermochemical kinetics and diffusion model for Jupiter's atmosphere that accurately describes the transition from the thermochemical regime in the deep troposphere (where chemical equilibrium is established) to the quenched regime in the upper troposphere (where chemical equilibrium is disrupted). The model is used to calculate chemical abundances of tropospheric constituents and to identify important chemical pathways for CO-CH4 interconversion in hydrogen-dominated atmospheres. In particular, the observed mole fraction and chemical behaviour of CO is used to indirectly constrain the Jovian water inventory. Our model can reproduce the observed tropospheric CO abundance provided that the water mole fraction lies in the range (0.25-6.0) x 10^-3 in Jupiter's deep troposphere, corresponding to an enrichment of 0.3 to 7.3 times the protosolar abundance (assumed to be H2O/H2 = 9.61 x 10^-4). Our results suggest that Jupiter's oxygen enrichment is roughly similar to that for carbon, nitrogen, and other heavy elements, and we conclude that formation scenarios that require very large (>8 times solar) enrichments in water can be ruled out. We also evaluate and refine the simple time-constant arguments currently used to predict the quenched CO abundance on Jupiter, other giant planets, and brown dwarfs.

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jupiter453130510.jpg

Location of Jupiter at 4:53, 13th May 2010

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Something is wrong in Jupiter. Astronomer Anthony Wesley's photos show that one of its two dark stripes is gone.
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Latest images of Jupiter

[acquerra.com.au]



-- Edited by Blobrana on Thursday 13th of May 2010 01:23:28 AM

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