Mars Definition and 499 Threads

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...

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...

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...

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...

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

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?

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...

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...

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...

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...

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...

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

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...

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.

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...

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.

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...

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 =...

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...

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...

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 "

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

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...

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...

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.

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...

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...

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...

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?

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...

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.

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).

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...

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...

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...

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...

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.

Hi all this is my first post. I'm not formally educated in physics concepts but find so much about it very interesting. I registered to ask if this is plausible: It appears we attribute our electromagnetic field on Earth to it's behavior deep inside the planet. There is supposedly a...

Title says it all. I was debating this with some friends that if I came into a nice hunk of funds, just how hard would it be to finance a two man ship to go to Mars?

Good morning, yesterday night I was out for a walk, and as usual - Venus and Jupiter rose in the West which is pretty hard to miss. But I also knew that Mars would rise in the East. I spotted a red shining point of light in the east and in the hazy city sky I assumed this was Mars. So my...

Homework Statement Estimate the lifetime of CO2 in the atmosphere of Mars. Homework Equations The Attempt at a Solution What is he asking? How long has the CO2 been in the atmosphere? It just seems rather vague.

How come the analemma for Earth is in a "figure 8" form and Mars is circular? Does it have to do with radial velocity?

I read this very interesting article on physorg about how planetary tilt is essential to life and various things that can diminish axial tilt over time or not give rise to one; things that would make life less probable. But I came across this quote that I couldn't help but question the accuracy...

As I understand it, Mars has 2 asteroids in orbit. One slowly moving away from Mars, the other on an orbital collision course. Could the collision possibly be violent enough to liquify the planets mantle? If so, would Mars re-establish a magnetic field? Is there sufficient ice in the polar caps...

Let's say we have two clocks that are synchronous here on Earth. One of the clocks is instantly transported to Mars. What time does the clock on Mars read? Is it ticking slower or faster than the one on Earth? I want to talk about SR here and not the gravity factor of GR. Let's say the...

Homework Statement Scientists have found evidence that Mars may once have had an ocean .5km deep. The acceleration due to gravity on Mars is 3.71m/s^2. (a) What would be the gauge pressure at the bottom of such an ocean, assuming it was freshwater? (b) To what depth would you need to go...

Is this as simple as the Earth making one complete revolution around the Sun in one year? Would you say Mars makes the revolution around the Sun in x year(s) and that is its time? I take it we are using time relative to the Sun in these questions.

please help me to solve this problem: Mars has a mean density less than the mean density of the Earth's mantle. How is it possible that Mars could have a metallic core given this fact? Hint: No calculations are required. Compare the densities used in part a) with the density of mantle rocks like...

So often I see shows on TV discussing the seemingly inevitable terraforming of Mars by humans. These shows generally talk about the challenges in creating an atmosphere (basically, heating up the frozen carbon dioxide to release greenhouse gases), thereafter releasing all of Mars' water, and...

Homework Statement Is the centripetal acceleration of Mars in its orbit around the Sun larger or smaller than the centripetal acceleration of the Earth? Homework Equations I assume that the relevant equation is a=v^{2}/r since you are trying to compare the centripetal accelerations of Mars...