منابع مشابه
The Atmosphere of Uranus
Cur r en t knowledge of t he a t m o s p h e r e of U r a n u s is rev iewed a n d specific ob jec t ives are sugges ted for sa te l l i te miss ions to U r a n u s . The a n o m a l o u s compos i t ion of U r a n u s m a k e s d e t e r m i n a t i o n s of i ts a t m o s p h e r i c compos i t i on pa r t i cu l a r ly va luab le for t e s t i n g theor ies of solar s y s t e m evolu t ion ....
متن کاملUranus’ aurorae past equinox
The aurorae of Uranus were recently detected in the far 2 ultraviolet with the Hubble Space Telescope (HST) pro3 viding a new, so far unique, means to remotely study the 4 asymmetric Uranian magnetosphere from Earth. We ana5 lyze here two new HST Uranus campaigns executed in Sept. 6 2012 and Nov. 2014 with different temporal coverage and 7 under variable solar wind conditions numerically predic...
متن کاملLast giant impact on Uranus
Context. Modern models of the formation of ice giants attempt to account for the formation of Uranus and Neptune within the protoplanetary disk lifetime. These models assume a higher initial surface density well above that of the minimum mass solar nebula model and/or the formation of all giant planets in an inner compact configuration. Other effects include planetesimals migration due to gas d...
متن کاملClouds of Neptune and Uranus
We present results on the bases and concentrations of methane ice, ammonia ice, ammonium hydrosulfidesolid, water ice, and aqueous-ammonia solution (“droplet”) clouds of Neptune and Uranus, based on an equilibrium cloud condensation model. Due to their similar p-T structures, the model results for Neptune and Uranus are similar. Assuming 30–50× solar enhancement for the condensibles species, as...
متن کاملMID-INFRARED ETHANE EMISSION ON NEPTUNE AND URANUS Short Title: Ethane on Neptune and Uranus
We report 8to 13-μm spectral observations of Neptune and Uranus from the NASA Infrared Telescope Facility spanning more than a decade. The spectroscopic data indicate a steady increase in Neptune's mean atmospheric 12–μm ethane emission from 1985 to 2003, followed by a slight decrease in 2004. The simplest explanation for the intensity variation is an increase in stratospheric effective tempera...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2014
ISSN: 0096-3941
DOI: 10.1002/2014eo140012