Mars Definition and 519 Threads

  1. R

    About the resupply missions in "The Martian"

    Two instances were discussed in the film where unmanned cargo ships were mentioned to send up supplies to extend the time Whatney or the crew of the Hermes could survive. This brought back painful memories while watching the movie. It's such an obvious answer. In the space shuttle Columbia...
  2. newjerseyrunner

    Is this a photograph of water on Mars?

    An article on Google News intrigued me today: http://www.express.co.uk/news/science/613745/world-s-FIRST-image-fresh-water-FLOWING-surface-Mars-Nasa-Red-Planet-life The man who pointed it out is editor for one of those conspiracy sites, but that doesn't make this particular claim any less...
  3. D

    Likelihood of confirming past life on Mars

    If there was microbial life on Mars in the distant past, would there be any way to conclusively confirm it? Or would any such attempt be reduced to speculation, like the Martian meteor which "possibly" contained evidence?
  4. BWV

    I If there is life on Mars should people stay home?

    Is it really possible to send people to Mars and not risk microbial contamination of any life there ? If the recent discovery of liquid water raises the possibility of life, should any human missions be delayed until this is understood better? ISTM if there are any living Microorganisms on the...
  5. S

    A "neat set of reactions" that makes fuel on Mars

    Hi, I'm reading The Martian by Andy Weir (fantastic book). A character, describing how a Mars mission works, says of fueling their ascent vehicle: "Through a neat set of chemical reactions with the Martian atmosphere, for every kilogram of hydrogen you bring to Mars, you can make thirteen...
  6. @PK nd

    Could Life Exist on Mars with the Discovery of Flowing Water?

    Does discovery of flowing water on Mars means that life even in microscopic form is possible ?
  7. mfb

    NASA NASA to Announce Mars Mystery Liquid water today

    That's the title of the NASA press release (I added the date). 8 a.m. PDT = 3 p.m. UCT = 5 p.m. CEST (Central European Summer Time) The panel includes an expert for the HiRISE experiment, a high-resolution telescope in Mars orbit. Whatever they have, apparently images of some area are highly...
  8. P

    Mars panorama from Curiosity shows petrified sand dunes

    Mars panorama from Curiosity shows petrified sand dunes Some of the dark sandstone in an area being explored by NASA's Curiosity Mars rover shows texture and inclined bedding structures characteristic of deposits that formed as sand dunes, then were cemented into rock. Continue reading...
  9. P

    Sweeping over the south pole of Mars

    Sweeping over the south pole of Mars An unusual observation by Mars Express shows a sweeping view over the planet's south polar ice cap and across its ancient, cratered highlands. Continue reading...
  10. chi_rho

    Travelling to Mars at constant velocity? Weightless?

    If I'm traveling on a spaceship at a constant velocity (say 10000 m/s) towards Mars will I feel weightless, or will I feel nearly weightless because I will still be slightly affected by gravity? I know that when astronauts are in the ISS they feel weightless because they are in a constant...
  11. Dr.Physics

    NASA What can we learn from a year-long Mars isolation experiment in Hawaii?

    I am very interested in the Astronautical area of science; however I am still in high school so I don't get a lot of time to read up on the latest news about this future mission. This is why I am eager to be filled in on the latest news about the mission. I am looking to know about the...
  12. praveena

    Existence of living organism on Mars?

    "Apparently, they have spotted a ‘woman like’ creature on Mars with the help of their Curiosity Rover".My question is: At low temperature & cosmic radiation, along with low gravity can we find a living organism? Is the above quoted lines was true? i have noted this news recently on facebook...
  13. james gander

    Mars one mission - Realistic or ridiculous?

    There is a thread called "mars mission - an act of luncay or science" but this thread is about a specific Mars mission called Mars one. Sounds to me like this mission is a big fat scam but who really knows? They have not even got any contacts signed at the moment, they have exaggerated the...
  14. Alex299792458

    Can small magnetic fields on Mars repel deadly radiation?

    Since Mars doesn't have a magnetic field of its own due to the cooling of it's core, what if you took a strong magnet from Earth say a superconductive magnet or electromagnet, will the small magnetic field (relative to mars) repel solar radiation, solar flares and other background radiation form...
  15. T

    Calculate gravitational field strength above surface of Mars

    1. Calculate the gravitational field strength at 500km above Mars' surface. Mass of Mars: 6.39 x 1023 kg Radius of Mars: 3.39 x 103 km Constant G: 6.67 x 10-11 2. I used the equation g = GM / r23. To begin with I added the 500km height above ground to the radius, giving 3.89 x 103 km. I then...
  16. C

    Did a Giant Impact Make the Martian Moons?

    by Ken Croswell The Martian moons look like asteroids—dark, crater-pocked, and potato-shaped—suggesting Mars had snatched them from the nearby asteroid belt. But now planetary scientists have conducted the first computer simulations that bolster a controversial alternative idea: The satellites...
  17. W

    Should we Colonize the Moon or Mars first?

    I have reasons that have convinced me that Mars would be better, but I want to know what everybody else thinks.
  18. JoelN

    NASA Didn't NASA find worms on Mars ?

    I think I am going crazy because i could have sworn i remember a press conference with NASA displaying rocks from Mars with worm fossils in them. and this was about 12-10 years ago. Any reference to this on the internet seems to have been wiped out...Am i crazy?
  19. A

    Martian's Weight on Mars Calculated

    Homework Statement On Mars, a martian tells you he has 35.0kg of mass. What is his weight on mars? Mars Info: Mass= 6.42x10^23 Radius= 3.40x10^6 Radius of Orbit about sun= 2.30x10^11 Homework Equations FG=GM1M2/R^2 The Attempt at a Solution I tried using the equation above, but i got...
  20. R

    Why is the Moon going above Jupiter in the sky?

    I went for a walk in a big park for 3 days. On first day I saw moon above Mars relatively in sky . Mars was looking like a pointy star being red in colour. The next day I saw Mars relatively above moon. The third day moon above Mars again and they rising high and high. Are they both having a...
  21. PWiz

    VASIMR Rocket can take you to Mars in 39 days

    Apparently, this news is all over the net. NASA has given a Texas-based company called Ad Astra Rocket a 10 million dollar grant (the money will be given over a 3 year period) to help develop a functional VASIMR rocket (Variable Specific Impulse Magnetoplasma Rocket), which will supposedly take...
  22. BilboBombadillo

    Help with circular velocity question (unit conversions?)

    Homework Statement Consider a satellite in circular low Mars orbit 300km above the planetary surface. R = 3396km M = 6.419 x 1023kg G = 6.674 x 10-11m3/kg/s2 Find the orbital velocity of the satellite (using the given values, I assume, as there is some inaccuracy in the real-life mass value...
  23. Kelson Adams

    Physics We colonize Mars, emerging industries?

    Let's say we colonize Mars today. What will some of the leading emerging industries be? I can imagine the energy sector (nuclear power, etc.), heavy materials sector (mining, etc.) and communications sector (internet, etc.) will be robust. What emerging industries could you imagine forming on...
  24. S

    Is the ball's height the same on Earth and Mars?

    Hi, I understand that if a ball is dropped on Earth and dropped on mars, the ball will reach the same height on both planets thanks the law of conservation of energy. Can anyone prove this mathematically? Thanks in advance
  25. Dotini

    Rare Plume on Mars: A Mystery Baffling Scientists

    In the spring of 2012 amateur astronomers spotted a huge plume rising from the Marian surface and captured it on video. They’ve been seen in the past rising to an altitude of 100km, but this one rose to more than 250 km. A reflective cloud of water-ice? An auroral emission of some kind? Or could...
  26. edpell

    Keeping People Alive on Mars: A Discussion

    There is a lot of talk about going to Mars. But not a lot of talk about how to keep the people alive on Mars. I am hoping we can talk about that here.
  27. G

    Relationship between characteristic energy and delta-v

    Firstly, apologies if this is in the wrong thread. I'm currently writing a presentation on the physics of getting a spacecraft from Earth to Mars in the near future. In my research I've come up against Porkchop plots which seem to plot contours of equal characteristic energy so you can find...
  28. T

    In depth Mars flight trajectory studies

    Can anyone point me in the direction of any published scientific work involving the study of Earth to Mars flight trajectories? I am thinking of researching this topic for a project and I would like to know about the work that has already been done.
  29. marcus

    Microbial mats traced in Mars sediment? Noffke's hypothesis

    This work looks solid and careful to me: http://online.liebertpub.com/doi/pdf/10.1089/ast.2014.1218 On Earth, in semiarid regions, mats of bluegreen algae develop in lakes and ponds which subsequently may completely dry up---the microbial material becoming part of a sedimentary sandstone...
  30. E

    Sending a Manned Expedition to Mars: Calculating Rocket Work Needed

    Homework Statement A manned expedition is planned to be sent to Mars in 2023, one way. If the colony module was 100.0 tonnes in mass. Determine the work that must be done by the rockets to carry this colony from Earth to the surface of Mars. Homework Equations ET = PE +KE PE = -GmM/r KE =...
  31. M

    How to Calculate the Distance Between Mars and Earth?

    Hi guys, There are many calculators and applications out there that can calculate you the distance between Earth and Mars at every time, but I'm trying to find the actual function that gives me so and draw the path of it. My objective is finding the distance R (and Phi of t), as shown below...
  32. Borek

    NASA NASA - water on Mars, sediment pictures

    http://www.nasa.gov/jpl/msl/pia19074/#.VIXlXTHF98Ehttp://www.nasa.gov/press/2014/december/nasa-s-curiosity-rover-finds-clues-to-how-water-helped-shape-martian-landscape/index.html#.VIXk_zHF98G That's just perfect! (can we repost the image here? I have no time to browse the site looking for the...
  33. Greg Bernhardt

    NASA NASA: We're sending humans to Mars

    NASA Officially Announce Plans To Put Humans On Mars With Orion Space Capsule http://www.huffingtonpost.co.uk/2014/12/02/orion-nasa-humans-mars_n_6255740.html "We're sending humans to Mars! Watch our #JourneytoMars briefing live today at 12pm ET: http://www.nasa.gov/nasatv #Orion "
  34. B0b-A

    What's the scale on Mars rover "Microscopic Imager" images ?

    What's the scale on Mars rover Opportunity's "Microscopic Imager" images ? I'm trying to work out if the Martian "fossil" shown could be the impression of a cross-head-screw ... http://mars.jpl.nasa.gov/mer/gallery/all/1/m/3720/1M458433044EFFCEQKP2955M2M1.HTML
  35. R

    Science-Fiction: What could impede the use of electricity on half of Mars?

    Hello. I’m a new addition to the board, and if I’ve posted in the wrong place or this is otherwise unwelcome, please PM me and let me know. I’m a writer and I’m working on a science-fiction novel set on Mars in the distant future. I can gather most of the information on the planet, the...
  36. T

    Can We Create a Magnetic Field on Mars through Moon Formation?

    In my opinion, any attempt to colonise Mars would require a sustainable atmosphere. Without a magnetic field; This atmosphere will quickly be stripped away by solar winds. Now if we were to "Build" a large enough moon orbiting Mars by towing asteroids into Martian orbit and allowing accretion...
  37. Alesak

    NASA NASA picks another Mars flight to explore its core

    http://phys.org/news/2012-08-nasa-mars-flight-explore-core.html Aww. Titan Mare Explorer looks way more exciting to me, even if we had results only when I'm 37 years old.
  38. G

    Nobel laureate gerard 't hooft supports dutch manned mission to mars

    i'm highly skeptical that the dutch can pull this off. http://phys.org/news/2012-08-dutch-reality-one-way-tickets-mars.html there are still so many obstacles to putting people on Mars that i seriously doubt a country of about 25 million like the netherlands could pull it off and this in...
  39. B

    NASA NASA Curiosity Rover Mars entry parachute deceleration question

    Can someone please point me to a deceleration graph over the 7 minutes of terror from the 13,000 mph re-entry speed through to the parachute release and landing of the Curiosity Rover on Mars? Thanks very much. :smile: PS: Mods please feel free to move this topic to the appropriate forum...
  40. D

    Minimum Distance Between Earth & Mars: Analytic Calc

    What is the minimum distance between Earth and Mars in course of their rotation in orbits? I need the derivation and analytic calculation. If we assume the plane of rotation is different for Earth and mars, the problem become to complicated. So the orbits may be assumed co-planner.Please...
  41. KenJackson

    Positions of stars as seen from Mars-different than from Earth?

    Positions of stars as seen from Mars--different than from Earth? I'm reading a novel that says , "On Mars the stars seemed a bit out of place, not in their correct position[s]." Could that be true? I suspect that if you disregard anything within our solar system, the stars would be so far...
  42. W

    What would Mars be like with 50% more density?

    What would Mars be like if it had 50% more density? Like what would be occurring inside, on the surface and the atmosphere? Would there be no water because of the extra density, hotter core, more atmosphere or any other processes?
  43. Drakkith

    What is the Latest Rover on Mars and Who Helped Make it Happen?

    7 minutes of terror turned into 7 minutes of triumph! We have the latest and greatest rover on Mars as we speak! Congratulations to NASA and everyone else that had a hand in building and delivering Curiosity to the red planet! Read more here...
  44. J

    Got doubts about Curiosity surviving Mars landing

    That landing manouever sounds too complicated, too susciptable to errors. But surely they know more than me and feel it's the best way. Still, I think it will fail. That's my prediction. Wasn't there a less error-prone way of setting down on the surface? Maybe though it was a budget issue.
  45. B

    Manned Mission to Mars: Ideal Locations for Exploration

    What locations on Mars would be good for a first manned mission? This is remembering that we want to 1. survive out there and 2. be able to look for possible signs of life and do other science (study geology and the atmosphere).
  46. M

    Finding Escape Speed on Mars: Advanced Gravitational Potential Energy

    Homework Statement The mean diameters of Mars and Earth are 6.9 10^3 km and 1.3 10^4 km, respectively.? The mass of Mars is 0.11 times Earth's mass. (a) What is the ratio of the mean density of Mars to that of Earth? (b) What is the value of the gravitational acceleration on Mars...
  47. X

    Finding the Optimal Time to Launch a Mission to Mars

    Recently for a project I have been trying to figure out the correct time to launch a spaceship and have it successfully reach Mars. This is what I've managed so far Because of Earth's orbit around the sun a ship would have a transfer orbit that looks like this Distance from starting point...
  48. R

    Is Sending Only Four People to Mars Enough for Colonization?

    Moderator note: Please read post #9 by DH before replying to this thread. This thread will be closely watched by the mentorsAccording to wiki See, I think the first mission of a crew four is too risky. You need a lot of people so that one person can mutually benefit from the labor of a large...
  49. L

    Mars-One: People living on Mars in 2023

    http://mars-one.com/en/ A former CEO (Bas Lansdorp) has started a company (Mars-One) with the intention of sending four people to Mars in 2023 to live there indefinitely. Yep, you read that right, they will live there forever. My BS meter initially was going wild but this story is...
  50. R

    The atmosphere of titan and mars

    If Mars' mass is .1 Earths and the pressure of its atmosphere is .6 kPa then why is Titan's atmosphere 147 kpa when its mass is .02 Earths? Apparently mass is not much of a factor in determining a planet's atmosphere.
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