tag:blogger.com,1999:blog-22973357.post6751117308355288621..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Maps of MarsSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-22973357.post-19997382191806825442007-02-17T09:45:00.000-05:002007-02-17T09:45:00.000-05:00stefan, thanks for all those great links to images...stefan, thanks for all those great links to images!Rae Annhttps://www.blogger.com/profile/10239791074376508016noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-17520052676408232292007-02-16T18:52:00.000-05:002007-02-16T18:52:00.000-05:00No Martian astronomy is possible in broad daylight...No Martian astronomy is possible in broad daylight, but some <A HREF="http://marsrovers.nasa.gov/gallery/press/spirit/20050909a.html" REL="nofollow">interesting astronomy</A> has been performed from the surface of Mars at night with the Rover Spirit.amaragrapshttps://www.blogger.com/profile/15769062084934190681noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-41723278481212949582007-02-16T18:09:00.000-05:002007-02-16T18:09:00.000-05:00Hi Arun,good point with the missing magnetic field...Hi Arun,<BR/><BR/><BR/>good point with the missing magnetic field. Is the atmosphere on Mars thin enough so that one can see bright stars in plain daylight? But I think that before astronauts set foot on Mars, there will be much more space probes in orbit, so perhaps they can install some kind of GPS system before? <BR/><BR/><I>there is a philosophical issue on what constitutes being lost?</I><BRstefanhttps://www.blogger.com/profile/09495628046446378453noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-49635585495930929212007-02-16T17:56:00.000-05:002007-02-16T17:56:00.000-05:00Dear Rae-Ann,yes, the famous face eventually has t...Dear Rae-Ann,<BR/><BR/>yes, the famous face eventually has turned out to be a not so very special hill in a region called Cydonia - see for example from the ESA website: <A HREF="http://www.esa.int/esa-mmg/mmg.pl?b=b&type=I&mission=Mars%20Express&single=y&start=20&size=b" REL="nofollow">'Face on Mars' in Cydonia region</A>. <BR/><BR/>The FU Berlin group has a recent news item about the <A HREF="stefanhttps://www.blogger.com/profile/09495628046446378453noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-42623336461535713362007-02-16T17:45:00.000-05:002007-02-16T17:45:00.000-05:00Dear Bee, Rae-Ann,yeah, but Venus is much more dif...Dear Bee, Rae-Ann,<BR/><BR/>yeah, but Venus is much more difficult ;-)<BR/><BR/>At least, the planet has those thick clouds that completly obscure the view of the surface. There was a mission to Venus in the early 1990s, <A HREF="http://www2.jpl.nasa.gov/magellan/" REL="nofollow">Magellan</A>, which produced maps of Venus from radar data.<BR/><BR/>Here is a <A HREF="http://www2.jpl.nasa.gov/stefanhttps://www.blogger.com/profile/09495628046446378453noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-9636989857495228962007-02-16T17:43:00.000-05:002007-02-16T17:43:00.000-05:00Hi Garrett,thank you for the link! The ESA Mars Ex...Hi Garrett,<BR/><BR/>thank you for the link! <BR/><BR/>The ESA Mars Express site has, beside a great conventional <A HREF="http://www.esa.int/esa-mmg/mmg.pl?mission=Mars+Express" REL="nofollow">collection of photos</A>, a fancy <BR/><A HREF="http://www.esa.int/SPECIALS/Mars_Express/SEMVZF77ESD_0.html" REL="nofollow">Mars Express image browser</A> where images a marked by small flags on a rotatingstefanhttps://www.blogger.com/profile/09495628046446378453noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-18971483290142325572007-02-16T14:36:00.000-05:002007-02-16T14:36:00.000-05:00At least, the future astronauts exploring Mars won...<I>At least, the future astronauts exploring Mars won't get lost!</I><BR/><BR/>Since presumably astronauts will precede a GPS system for Mars, how will they do this? <BR/><BR/>Will some instrument take a measurement of local features and then correlate with the map? A human could do it if they roughly knew which area of the map to look at, but they'd also need to orient themselves. Mars has tooArunhttps://www.blogger.com/profile/03451666670728177970noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-81016558689634261092007-02-15T19:58:00.000-05:002007-02-15T19:58:00.000-05:00I guess these maps completely kill that "face on M...I guess these maps completely kill that "face on Mars" thing from several years ago. ;-)<BR/><BR/>And I agree with Bee...Rae Annhttps://www.blogger.com/profile/10239791074376508016noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-55147152594378428612007-02-15T19:23:00.000-05:002007-02-15T19:23:00.000-05:00nice post :-)I think men should try to explore Ven...nice post :-)<BR/><BR/>I think men should try to explore Venus...Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-1866409654044411712007-02-15T17:09:00.000-05:002007-02-15T17:09:00.000-05:00If you want to fly around Mars, Earth, Moon, Jupit...If you want to fly around Mars, Earth, Moon, Jupiter, this program is pretty cool:<BR/><BR/>http://www.worldwindcentral.com/wiki/Main_page<BR/><BR/>Sadly, I think it only works under windows. :(Anonymousnoreply@blogger.com