Mars Definition and 499 Threads

I have been trying to figure out why I can see Mars, by eye, even when it is very close to a bright, almost full Moon. Firstly, Mars at its closest to Earth only has an angular diameter of less than 1/2 an arc minute, while the accepted limit of resolution of the eye is 1 minute. That equates...

http://www.bbc.co.uk/news/science-environment-21603490 http://www.bbc.co.uk/news/science-environment-21608742

I'm trying to determine how many bits are required in the memory buffer register and in the memory address register given certain memory systems. For example, given the below system, how many bits are needed in MAR, and MBR if the memory is word addressable and how many bits if the memory is...

Scientists want to place a 2900.0 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.6 times the radius of Mars above the surface of the planet. Here is some information that will help solve this problem: mmars = 6.4191 x 10^23 kg rmars =...

Homework Statement A certain volcano on Earth can eject rocks vertically to a maximum height . Part A: How high (in terms of H ) would these rocks go if a volcano on Mars ejected them with the same initial velocity? The acceleration due to gravity on Mars is 3.71 m/s^2 , and you can...

Hi, I am researching a book, and would love to have the help of a space scientist (or similar) who can calculate orbits etc. Specifically I need accurate figures for an Earth to Mars trip, in a Hohmann transfer orbit, not using conventional propulsion but using a VASIMR engine. Givens...

Is this feasible? The astronauts that are traveling to Mars will not be returning and instead will live on the planet for the rest of their lives... At first, I thought this was some sort of hoax. Source: http://mars-one.com/en/mission/is-this-really-possible

The rover on Mars reported on Mars dirt samples, and they talked about calcium perchlorate tetrahydrate. I have been searching for a molecule layout of this chemical (like a pdb or cis style file) that can be viewed in say JMOL with no luck. Does anyone know a good site to get layouts of...

I'm sure that Earth-built vehicles and heavy equipment wouldn't function in the cold of an airless planet or moon because all lubricant and fuel would freeze, among other issues. So how do you design vehicles and other equipment for transportation and work in those environments? Would electric...

http://http://www.npr.org/blogs/thetwo-way/2012/09/27/161896238/streams-of-water-once-flowed-on-mars-nasa-says-photos-prove-it?utm_source=NPR&utm_medium=facebook&utm_campaign=20120927 Interesting article about proof of running water on the surface of Mars. This means that Mars once had a...

Lets say Mars has a density of 6 g cm/3 instead of its current density and kept its radius. What would the effects of this increased mass be? Im curious on the interior like the core and mantle. Im curious about the surface like mountain height, rate at lava flow, geologic activity. Also am...

Homework Statement It has been suggested, and not facetiously, that life might have originated on Mars and been carried to Earth when a meteor hit Mars and blasted pieces of rock (perhaps containing primitive life) free of the surface. Astronomers know that many Martian rocks have come to...

Hi all, This is my first post. I am a fourth year undergrad doing a project on astrobiology. in order to do calculations of meteorite impact on the surfaces of europa, enceladus, and mars, i need their atmospheric density profile models. Any idea where i could find those? thanks in...

Suppose a large, 'dirty snowball' comet, 25-50km in diameter or more, were to hit Mars at some speed, say 75,000 km/h. I am quite certain it would vapourize on impact. And the impact will create super-heated high-velocity shock waves which will travel around Mars at least once, probably...

A ball is thrown with an initial speed of v0=39.2m/s vertically to Mars. Its initial height is h=15m from the surface of mars. the acceleration of gravity on Mars is g=3.7m/s^2 (1) what is the maximum height hmax of the ball (2) How long is the ball in the 'atmosphere' (3) What is the speed...

I have to design a space rover for Mars that has to have quite a few operating gadgets on it. Without giving a lot of details I am using sketch up and needless to say it sucks. I can't even figure out how to make a wheel. and I can't make objects at angles, like shafts or motors or anything...

Homework Statement what is the speed of MRO in its orbit around mars. M mars=6.4X10^23 m MRO=907 Kg d between the two=200 km R of mars=3400 km G=6.7X10^-11 Homework Equations D=(mMG)/r^2=(mV^2)/R=(MG/R)^1/2 The Attempt at a Solution I attached a pic of some of my work. if I...

Homework Statement Assuming that the sun lies at the principal focus of the solar system, and given that the semi-major axis and eccentricity of Mars is 1.5237 AU and 0.0934 respectively, calculate: The distance (in AU) when Mars is closest to the Sun (known as perihelion). The angle θ=0°...

Recently I saw this in the news...any thoughts on this? jhd as joesmith

I hope you enjoy it. feel free to post comments and questions. Thanks, dfrank

Homework Statement Mars orbits the sun at a mean orbital radius of 228 Gm ( 1 G = 10^9 m) and has an orbital radius of 687 days. Earth orbits the sun at a mean orbital radius of 149.6 Gm. The earth-sun line sweeps out an angle of 360 during one Earth year. Approximately what line is swept...

Homework Statement We have a balloon that is need to stay buoyant in Mars atmosphere, to make it hover. Density given for Mars's atmosphere is 0,0154 kg/m^3. Let's assume that we have to make balloons out of thin firm plastic, with surface density of 5 g/m^2. Balloons would be inflated with...

I know there are many obstacles in the way of sending a manned mission to Mars, as described by Chronos in the "High School Debate" thread. I have a few questions of my own about ideas that will help to overcome these obstacles. 1. The weightlessness is one of the big barriers. I have seen...

Homework Statement An asteroid is located between Mars and Jupiter. It is thought that a planet once orbited here but was somehow destroyed and broken up into small chunks(perhaps by getting hit by a comet or asteroid). If an asteroid in this belt has an average distance from the sun of 500 *...

I have been working on an idea for a little while.. A large hurdle in planning for this idea is that I need to figure out what the net gravitational pull would be on a 17,200km long cable going from a geosynchronous orbit around Mars to the surface of the planet would be. Its basically...

Homework Statement Earth and Mars are both rocky planets, but Mars is half as far away again from the Sun as Earth, so radiation from the Sun is not as powerful at the surface of Mars as at the Earth’s surface. Using the values in Table 2, calculate the amount of solar radiation...

During the many millions of years that Mars has existed is it possible a random CME event released a solar mass of plasma that struck Mars and powered off the Martian atmosphere and the Martian ocean(s) and made Mars almost sterile?

Let's face it: it would be a lot cheaper to go to the moon. How does the value of going there compare to the value of going to mars? Anyone pitch in...

How are the numerical values of gravitational field strength and acceleration due to gravity on Mars related?

Questions regarding "Earth life came from Mars" - ? - Thanks Hey guys ans girls, Ok now i am not fully versed in this theory, but the basis is that the life on Earth started from a impact from a piece of mars, that contained organisms, that survived the impact, and started life on earth...

Could one exist that size that we don't know about?

Homework Statement You are in a vehicle heading towards Mars at constant speed. A superspeeder is going at constant speed 0.9c relative to you. When the superspeeder pases you, both times start at 0. "At the point when you measure the superspeeder has traveled 1.4 x 10^7 m past you, what...

Iv been watching the NASA guys work on the Mars lander on Ustream, and starting to really get into it. But I have a question: What factors make landing on Mars easier than on the Earth? Harder? And I am having a debate with a friend, maybe one of you can help. Which variables are important...

This article made me wonder - how many people would go to Mars if it was a one-way trip? http://www.sciencedaily.com/releases/2010/10/101019171709.htm"

Homework Statement The semimajor axis is decreasing at a rate of 20 cm yr−1. At that rate, how long is it until Phobos hits the surface of Mars the semimajor axis is 9380 km Homework Equations The Attempt at a Solution Well first i found the distance from Mars to phobos which was...

1. Calculate the force of gravity between a newborn baby of mass 3 kg and the obstetrician of mass 100 kg, who is 0.5 m from the baby. Which exerts more gravitational force on he baby, Mars or the obstetrician? By how much? 2. F = G m1m2/d2 3. Fg = (Gm1 Gm2) /d^2 =Fg= g ( 3.00...

1. Calculate the force of gravity between a newborn baby (mass=3kg) and the planet Mars (mass=6.4 X 10^23 kg) when Mars is at its closest to Earth (distance=5.6 X 10^10 m). 2. F= G m1m2/d2 3. I got this far and I don't know how to break down the equation any further: F= G M m /R^2=...

Life on Mars? The question is not whether there is life on Mars, but whether life existed on Mars long ago.

I was wondering how feasible it would be for a spacecraft to use a lunar gravity assist on its route to Mars. Specifically, I was wondering; 1.) Would such a maneuver boost the delta-v en route to Mars? 2.) Would any such boost be possible in terms of its geometry? (i.e., would a lunar...

So I received an email today about how Mars is supposed to be the closest to Earth in like 5000 years and that it should look like a smaller moon directly next to the normal moon. I looked around the internet and some sites say that its a hoax. Does anyone know anything about this at all?

I've kind of been wondering that, we know that it used to have an ocean and we also know, based on mountains like Olympus Mons that it used to have an active core. That core is now dead, but why?

the part of Mars planet nearest to the Earth is and the part of Mars planet farthest to the Earth is

Does anyone remember the Nasa image of the 'segmented worm' found on Mars? I had recently seen a documentary on PBS about fractals in which it was stated that all biology is based on fractals and that if one could establish a fractal pattern in something, then it was certainly biological. I...

I was recently thinking of a way to get to colonize Mars and the moon and provide cheap travel between them, after building space infrastructure. First we put a von braun station in an eccentric orbit around the earth, Then when the station is closest to Earth we take SSTO spaceplane and dock...

Might one place a telescope in Mars orbit, in order to obtain 6" to 1 ft resolution, looking for closeup geological views; such as mars' stromatolytic fossils, or mars' ice (rock) on the surface, in form of a smooth surface that seems a bit odd? Might billions year old Mars' ice be opaque to...

Mars Now -- Third Alternative To NASAs Mars "Who Knows When" Program My main objective, using current state of technology, is to safely get men and women to Mars and back to Earth without having to utter the phrase "People Will Certainly Die" as NASA does. To achieve this I would freeze all of...

To Mars Obama just proposed having astronauts orbiting Mars in the mid-2030s. I already know that in 2035 we'll have a fairly close approach to Mars. However, this time frame is interesting for another reason. Sending a vehicle in orbit around Mars is all we really need to do to set the stage...

NASA wants to fire a satellite into a circular orbit around Mars that will maintain 'station' above the Martian equator. what is the distance from the surface of mars? ok first of all does the term 'station' refer to when g = 0? and the equation I've used is: Fc = Fg mv²/r = GMm/r²...

I am curious how easily my theory can be disproven... I have never heard anyone mention it, and as well I have no knowledge to support it. I was daydreaming of what would cause a planet simular to ours, to lose all of its elemental resources. It could be the fact that I am reading a book on...

Homework Statement In class, we use the CGS system, so I do all my work in cgs units and then convert at the end. The mean distance of Mars from the sun is 2.3 * 10^13cm 1 arcsecond = (1/60) of (1/60) of 1 degree, = 1/3600th degree Let d = distance of 1 parsec The Attempt at a Solution...