Astronotes Armagh Planetarium's Stellar Blog! ... Pluto revealed in the last image returned before the encounter. New Horizons was 766 000 km from the dwarf planet. ... Image credit: NASA) . ... In contrast, Charon, Pluto?s largest moon has a greyish-looking surface of water ice. ... Norgay Montes: The ice mountains of Pluto (image credit: NASA-JHUAPL-SwRI) . ... Image credit:NASA/JHUAPL/SWRI) . ... Before the encounter New Horizons imaged Pluto and Charon together from 6 million km away. ...

. Mars has become the center of intense interest since the Martian Meteorite results were announced. Currently there is a lively debate whether or not primitive life formed there or not.

... Opportunity at Santa Maria Crater . ... 29.01.2011 . ... Credit Copyright: Mars Exploration Rover Mission , NASA , JPL , Cornell ; Image Processing: Marco Di Lorenzo, Kenneth Kremer Explanation: Celebrating 7 years on the surface of the Red Planet , Mars exploration rover Opportunity now stands near the rim of 90 meter wide Santa Maria crater . ... January 2011 . ... Publications with keywords: Mars - Martian Rover . Publications with words: Mars - Martian Rover . ... Intrepid Crater on Mars . ...

... 2011 January 29 . Opportunity at Santa Maria Crater . Credit: Mars Exploration Rover Mission , NASA , JPL , Cornell ; Image Processing: Marco Di Lorenzo, Kenneth Kremer . Explanation: Celebrating 7 years on the surface of the Red Planet , Mars exploration rover Opportunity now stands near the rim of 90 meter wide Santa Maria crater . Remarkably, Opportunity and its fellow rover Spirit were initially intended for a 3 month long primary mission. ... About APOD | ...

The Bringer of Peace V enus is the second planet from the Sun and the sixth largest. ... S ince Venus is an inferior planet, it shows phases when viewed with a telescope from the perspective of Earth. ... T he pressure of Venus' atmosphere at the surface is 90 atmospheres (about the same as the pressure at a depth of 1 km in Earth's oceans). ... Craters on Venus seem to come in bunches indicating that large meteoriods that do reach the surface usually break up in the atmosphere. ... Earth .. ...

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Site Info . ... It is from from Voyager 1 and shows a whopping big impact crater dominating the profile of the moon. Note that Mimas is about 400 kilometers across (about 250 miles). ... The wall around the crater is 5 kilometers high, and that central peak rises 6 kilometers above the surface (many impact craters have a large central peak which is caused by a pressure rebound from the impact). ... 2008 Phil Plait. ...

The Bringer of Peace V enus is the second planet from the Sun and the sixth largest. ... S ince Venus is an inferior planet, it shows phases when viewed with a telescope from the perspective of Earth. ... T he pressure of Venus' atmosphere at the surface is 90 atmospheres (about the same as the pressure at a depth of 1 km in Earth's oceans). ... Craters on Venus seem to come in bunches indicating that large meteoroids that do reach the surface usually break up in the atmosphere. ... Earth .. ...

... Space Telescope Science Institute and Johns Hopkins University . A multidisciplinary course exploring the origins of life, planetary formation, Earth's evolution, extrasolar planets, habitable zones, life in extreme environments, the search for life in the Universe, and space missions. DiRuggiero, Norman, and others, 3 credit hours. ... The JHU Department of Earth and Planetary Sciences also offers courses that may be of interest to students interested in astrobiology: . ...

Giant Jupiter. Jupiter . ... Jupiter has no solid surface that is why speaking about its dimensious point the radius of the upper border line of the clouds, where the presseru is about 10 KPa; radius of Jupiter on the equator is 71400 km. ... The Jupiter satellites. ... Nowadays 16 satellites of the Jupiter are known: Adrastea, Mitis, Amaltea , Phina,then 4 Galilei satellites: Io , Europe , Hanimed , Callisto , Leda, Aimalia, Zicitea, Elara, Ananke, Carme, Pasipe and Sinope. ... Jupiter's ring. ...

... NASA SPACECRAFT FINDS NEW EVIDENCE FOR WATER ICE ON MERCURY . ... The new data indicate the water ice in Mercury's polar regions, if spread over an area the size of Washington, D.C., would be more than 2 miles thick," said David Lawrence, a MESSENGER participating scientist at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Md., and lead author of one of three papers describing the findings. ... Water ice concentrations are derived from the hydrogen measurements. ...

Ganymede is the largest moon in our solar system, larger even than the planets Pluto and Mercury. ... Ganymede's surface consists of two main types of terrain: old, dark polygonal units, and young, bright valleys and ridges (see figure 11 ). ... In a similar way, hitting a large block of ice with a hammer makes white marks. ... Ganymede as seen by Voyager 2. ... Because Voyager couldn't spot any large impact craters, scientists have concluded that the moon's surface is young. ... Moon . ... Europa . ...

... Big planets are highly circular. PPT Slide . Things are very different for small planets . ... Surface Gravity . Gravity correlates with Size . ... 433 Eros . Atmospheres: big planets are all atmosphere . Medium sized planets have moderate atmospheres . Small planets have no atmospheres . Atmospheres . ... Home Page: http://msowww.anu.edu.au/~pfrancis/astr1001/ . ... Course Notes for ASTR1001 Astronomy ...

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... Go directly to the moons of: . Mercury Venus Mars Jupiter Saturn Uranus Neptune Pluto . Go directly to the surface features of Earth's Moon and Mars . Planet & Moons . Pronunciation . ... Mercury . ... Mars: . 2 moons . ... Jupiter: . ... Neptune: . ... 1 moon . ...

... Tonight's Sky . ... 50 Weirdest Objects . ... Early Mars bombardment likely enhanced life-supporting habitat . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Do the gas giant planets have discernible surfaces? If so, would they support objects? ... Gas giants like Jupiter and Saturn do not have solid surfaces in the sense that if you dropped in a penny, it would never land with a clink. ... Get instant access to subscriber content on Astronomy.com! ...

... The exploration of the planets figured prominently in the Space Research Institute (IKI) activity. Experimental studies are given priority. ... Meteorological measurements are taken on the surface and in the atmospheres of other planets. Alongside experimental studies considerable attention is given to the elaboration of theoretical problems, mainly in the field of the simulation of processes in planetary atmospheres, including the early stages of their evolution. ... Mars Climate . ...

This section of AMPLE enables one to make ephemeris calculations in various coordinate systems (spherical, rectangular) connected with different main planes (equator, ecliptic, horizon) and having origin in different points: geocenter, any point on the Earth surface, the Sun, any major planet, any minor planet. The choice of some minor planet as a center gives possibility to find approaches of the minor planet with any set of major planets and minor planets. ... equinox . 1950 2000 true . ...

Next: Stealth Comets Up: W.M. Napier Previous: W.M. Napier Contents . ... If material ejected from the Earth contains microorganisms and spores, the question arises whether life may be carried from planet to planet within the solar system. ... However, the solar system is tiny on the scale of the Galaxy, and it has generally been thought that the transfer of life between stars is impossible -- the microorganisms would be destroyed by cosmic rays, ultraviolet light and so on. ...

Microsymposium 38, MS083, 2003 (A4 format) MERCURY: LOCAL VARIATIONS OF THE PHOTOMETRIC RELIEF. ... Because of trajectory and pointing angle constraints the planet could be observed from Mariner 10 only over a small range of phase angles between about 75o and 110o. Therefore the photometric investigations are restricted to measuring the distribution of brightness on the Mercurian disk. ... Raw versions of real-time processing pictures FDS 0000984 and FDS 0000986 were used (images 196 and 202). ...