Discussion in 'Science & Technology' started by micropage7, Aug 7, 2012.
Opportunity Discovers That Oldest Rocks Reveal Best Chance for Martian Life
ooo... you passed me. i just wanna post the same
Latest photo, IMO it's the best ever.
Curiosity Mars rover during the 526th Martian day (Jan. 28, 2014)
Unposted pictures made by Spirit and Opportunity
thanks for updating
its been a while i havent seen any news from Spirit and Opportunity
New b/w photo made by Opportunity
New true color shot of Dingo Gap made by Curiosity
New high resolution images of Martian rocks Harrison and Darwin. Could be a good texture pack for Doom's Martian levels lol
Dingo Gap Sand Dune bigger version
And watch panorama here
Friday Martian goodness!
NASA spacecraft spots new crater on Mars
Martian Avalanches And Defrosting Dunes
Another shot of Dingo Gap and Gale Crater
Curiosity captured Earth and Moon in Martian twilight sky (picture and video below)
It's amazing! First picture of Earth from Mars!
A fresh crater! Info from this could have a huge impact!
I was with a team of engineers at school who were designing a lunar rover prototype. The reason they gave for aluminum was three fold. It deforms much easier than other metals, it forms a protective layer during oxidization, and the weight is low.
Deformation makes traveling over uneven surfaces much easier. The shaped treads are able to elasticaly deform around the surface, and scale surfaces that would otherwise only allow the wheels to spin on.
Oxidization prevents pretty much any ferric materials from being used. The whole "red planet" moniker isn't for nothing. Carbon steels would oxidize too fast, and stainless steels are far too heavy. Utilizing titanium is tricky. Titanium tends to oxidize in a rather funny way, and produce some stunningly colored metal. If you have time, check out the forced oxidization projects, which can produce a rainbow of colors. All you need is an acidic solution and a controlled amperage.
Low weight is a huge concern in the rover. Titanium sounds great on paper, being that it is stronger than steel and significantly less dense. The part that is often forgotten is that aluminum and its alloys are nearly half as dense as titanium. That kind of weight reduction yields a significantly less robust wheel, but at almost half the mass you can actually afford to send it into space. Each pound counts.
Again, focusing on the small amount mass that can be blasted to the red planet, that "paper thin" aluminum makes us squishy humans look pretty fragile by comparison. It's less than that thickness of aluminum which skins the wings on passenger planes, which generate enough lift at take-off to carry several tons of aircraft into the sky. The steel mesh that you load lawn mowers onto (assuming you've got a trailer) is only 0.101 inches wide by 0.068 inches thick, and it isn't even a solid. Engineers for NASA are good at pushing the envelope. Occasionally this backfires...fill in your own jokes about metric to imperial conversions here.. but more often than not we get to see something truly amazing.
Curiosity leaves Dingo Gap
Rear view: Curiosity looks back to ‘Dingo Gap’ sand dune *waves goodbye*
New raw images
New b/w gif and two jpegs
New colored and b/w photos taken by Curiosity and Opportunity
New Martian photos:
Mars Reconnaissance Orbiter spotted Mawrth Vallis dunes
Opportunity Rover on ‘Murray Ridge’ seen from orbit
Opportunity captured this photomosaic view on Feb. 16, 2014 (Sol 3579) from the western rim of Endeavour Crater
Up close photomosaic view shows lengthy tear in Curiosity’s left front wheel caused by recent driving over sharp edged Martian rocks on the months long trek to Mount Sharp.
Curiosity scans Moonlight Valley beyond Dingo Gap Dune
New images and video
A retro photo
This panoramic image of sand dunes and large rocks is the first photograph taken of Mars (Voyager 1's Camera 1 on July 23, 1976).
And of course new stuff:
That was mount Sharp and Dingo gap. And here are barchan sand dunes: (view from above)
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