Water

[spacecrusader]

What other planets have Ice/water on them?

 

[nexium]

Likely all the planets have trace amounts of water or ice, except Venus which has traces of water vapor. Likely only Earth, and much smaller bodies have large quantities near the surface. Venus has considerable water tied chemically to sulpheric acid vapor.<br />Some of the extrasolar planets likely have lots of surface water, but we have not varified this hypothesis. Neil

 

[docm]

Planets:<br /><br />Mercury (3.5% of its trace atmosphere), Venus (atmospheric), Earth (everywhere), Mars (poles & subsurface), Jupiter (atmospheric), Saturn (atmospheric), Uranus (atmospheric), Neptune (atmospheric)<br /><br />Minor planets:<br /><br />Pluto (thick ice mantel), Ceres (60+ km deep surface)<br /><br />and lord knows how many moons, comets & asteroids. <div class="Discussion_UserSignature"> </div>

 

[robnissen]

Water is virtually ubiquitous. Liquid water is the holy grail. Only known liquid water is earth. Highly likely on Europa, and reasonably possible on Enceladous. Also some evidence for Mars and Callisto.

 

[h2ouniverse]

Hydrogen is the most abundant element in universe and solar system.<br />Helium is second but is not chemically reactive.<br />Oxygen is third.<br />And highly reactive, especially with reductive substances like... hydrogen.<br />Hence plenty of H2O everywhere.<br />The only places depleted in H2O are close to stars, because H2O vaporizes in the protostellar cloud due to stellar thermal flux and stellar winds blow vapor away beyond the frost line. Note for Solar System that this area beneath frost line includes Mercury, Venus, Earth, Mars, the asteroids. Water is then brought back in inner system by comets.<br />On the opposite, the outer system is full of H2O.<br /> <br />Best regards.

 

[ashish27]

you see there is also some H2O in SDC! so?? (kidding)

 

[h2ouniverse]

yes, given my alias, I had to answer...

 

[thesmartonewon]

hydrogen is the most abundant substance in the universe??? You are assuming that you know what the entire universe is. i would have to say that i think nothing is the most abundent substance in the universe.

 

[adrenalynn]

Hydrogen is the most abundant substance in the <i>visible universe</i>, with absolutely ZERO evidence to the contrary, visible or otherwise, exhibited anywhere that I am familiar with. I welcome the education if someone can provide me [respectable] reference to the contrary.<br /><br />I believe that should help clarify the very valuable insight <i>H2Ou</i> provided to the OP? <br /><br />[edited to remove ambiguity, as/per request -A] <div class="Discussion_UserSignature"> <p>.</p><p><font size="3">bipartisan</font>  (<span style="color:blue" class="pointer"><span class="pron"><font face="Lucida Sans Unicode" size="2">bī-pär'tĭ-zən, -sən</font></span></span>) [Adj.]  Maintaining the ability to blame republications when your stimulus plan proves to be a devastating failure.</p><p><strong><font color="#ff0000"><font color="#ff0000">IMPE</font><font color="#c0c0c0">ACH</font> <font color="#0000ff"><font color="#c0c0c0">O</font>BAMA</font>!</font></strong></p> </div>

 

[h2ouniverse]

TSO,<br /><br />Hydrogen is the most abundant element of visible classical matter, in the visible universe. Discussing likelihood of abundance of water in the Solar System and in billions of billions of potential classical-matter planets elsewhere is our debate there.<br />I fully agree to relativize any part of our knowledge, but whether dark matter exists or not is another debate. Even if it exists it is said not to be reactive chemically, unless you have detected molecules of WIMP-OXYGEN-WIMP? I hope one day we will find exotic forms of organisation of matter/energy. But until then, we may have to reserve our capability to be amazed with classical matter wonders (and there are many).<br /><br />Best regards.<br />

 

[kelvinzero]

water water everywhere, but not a drop to drink <img src="/images/icons/wink.gif" /><br /><br />Do we know if there are any useful quantities of ice or other sources of hydrogen on the martian moons? At least they have carbon, dont they?