Does Mars have bright or dim sunlight?
968448
It has thinner atmosphere and is further from the sun, so it should be dimmer, however the entire planet is highly reflective sand so it can probably be somewhat bright to the eye as well.\n\nBut as compared to Earth, I would imagine it's dimmer.
501458
Here is the "face on Mars" area with roughly the same shadows as when the Viking orbiter  first saw it but with higher resolution. I will also link you to an interesting rock face in New Hampshire (it is on the back of the New Hampshire quarter, but some big chunk of it fell off recently.)\n\nBabies can identify something as a face pretty much at birth. This is so hardwired into us we can see face like shapes in lots of things.\n\n"Face" on Mars Images and discussion: http://www.msss.com/mars_images/moc/extended_may2001/face/\n\nMore "face" on Mars images, including a smiley face in a crater: http://www.solarviews.com/eng/face.htm\n\n"Old man of the mountain" in New Hampshire image: http://www.nelsap.org/cam/oldmanbig.jpg
940660
Much larger.  It is a gas planet, where Mars is a rock planet.
1167026
Without an atmosphere, our sky would be black witha bright sun in the middle. That is because all teh ligt comes from teh sun. When a planet has an atmosphere, the light scatters of teh nitrogen molecules in teh air. Thin of it as light hitting a molecule and bouncing off in all directions. That way light that is not directed towards us gets redirected by teh scatering so light seem sto be coming from all parts of the sky.\nScattering intensity increases with shorter wavelenght, so blue light gets scattered the most. (actually UV gets scattered even more so the sky is brighter at UV frequencies)\nAt sunset, the sunlight has to go through a lot more atmosphere then at noon. So scattering increases so much that only red light is left.\nTry it for yuorself:shine a flashlight at a glass of milk in teh dark and see the milk tunr blue or red
524151
The idea that life could, or even does, exist on Mars has a long history. In 1877 the Italian astronomer Giovanni Schiaparelli claimed to have seen a planet-wide system of channels (Italian canali). The American astronomer Percival Lowell then popularized these faint lines as canals and held them out as proof of a vast attempt by intelligent beings to irrigate an arid planet. Subsequent spacecraft observations have shown that there are no canals on Mars, and various other alleged proofs of life on the planet have turned out to be equally illusory. The dark areas once thought to be oases are not green, as contrast effects had made them seem to terrestrial observers, and their spectra contain no evidence of organic materials. The seasonal changes in the appearance of these areas are not due to any vegetative cycle, but to seasonal Martian winds blowing sterile sand and dust. Water probably occurs only as ice on and below the surface and as trace amounts of vapour or ice crystals in the Martian atmosphere. The strongest evidence against the presence of life, however, is the thinness of the atmosphere and the fact that the surface of the planet is exposed not only to lethal doses of solar ultraviolet radiation but also to the chemical effects of highly oxidizing substances (such as hydrogen peroxide) produced by photochemistry.\n\nPerhaps the most fundamental and far-reaching result obtained by the Viking landers is that the Martian soil contains no organic material (there is no reason to assume that the two landing sites are not representative of the planet as a whole). Although small amounts of organic molecules are continually being supplied to the surface of Mars by carbonaceous meteoroids, this material is apparently destroyed before it has a chance to accumulate. The results of the soil analysis for organic molecules carried out by the Viking landers provide no evidence for the existence of life.\n\n Answering the question of life on Mars will probably involve...returning [samples] to Earth  \n\nA more difficult question is whether life has ever existed on Mars, given the strong evidence of climatic change and the indications of a previously warmer, thicker atmosphere. Suggestions that structures found in a meteorite discovered in Antarctica, which may have been blasted off the Martian surface, were fossil traces of bacteria-like organisms have since been discounted. However, answering the question of life on Mars will probably involve collecting carefully selected subsurface samples and returning them to Earth for detailed analysis. NASA has proposed a manned expedition to Mars early in the 21st century.
191345
it is the brightest planet not but the sun is a star(the main source of all the energy in the solar system)venus derieves its brightness from the sun ,how can it be brighter rhan the sun
90126
Venus (called the Morning Star as it is visible in twilight) should be pretty bright in the eastern sky. \n\nI'm ignoring the moon or sun as you will immediately recognise them (hopefully). the moon appears at different positions at different times of the month.
855384
Actually it's more of a pink than red.  And it's not always red.\n\nThe red comes from all the dust suspended in the atmosphere, which comes from the severe dusts storms that are common on Mars.  The Martian "soil" is red, so when a lot of that "soil" or dust is in the air, that makes the sky look pink.  The soil is red because there's a lot of a rust-like compound in it.\n\nIf all the dust settles out of the sky, then the sky would be a pale blue color.  Blue for the same reason Earth's sky is blue.  Pale because the Martian atmosphere is very very thin.
900602
Well, it depends how good your eyesight is, but if you have perfect vision, yes it is very possible to see sunlight reflecting off a satellite or space station with the naked eye. It is not possible to see the light being generated within the space station, only the reflection of the sun from it. That's why the best time to look for satellites and space stations is just after sunset or just before sunrise, otherwise they are in the earth's shadow for the remainder of the night.
1010582
it is the difference in brightness between the stars and any astronaut, cosmonaut, space shuttle, or international space station.  the stars are just too dim.  a much longer exposure time is needed to photograph dimmer objects.  ask someone who knows about photography.\n\nhttp://en.wikipedia.org/wiki/Photography
581391
as the earth spins on it's axis the distance from any one given point on earth to the sun changes throughout the day. Near midday the sun is directly above you and closest to you, thus it is very bright. As the day goes your point on earth spins away from the sun, making it further away, and you are also seeing it through all the dust in the atmosphere, making it less bringht and appear yellow/red.
528789
1)Sunlight\n2)Twilight\n3)Midnight\n\nno joke, this is true. See link below.
262627
It is.  It's just very dark blue so it looks black.  I'm sure you'll agree that even a "very bright" moon is a lot darker than the sun.  I took a picture at night for fifteen seconds at 1600 ISO on a hazy night and the sky came out blue.  I think the bright points (stars) add contrast to the sky that make it look dark so the haze evened the sky out.
139607
Venus is brighter ,but the space station when you saw it might have been turn in a way that it was'nt getting a big reflection.Maybe it could be the time of year because of the axis of the earth .Just a guess.
236374
A very bright "star" that's usually reported is the planet Venus. It rises and sets close to the sun and has therefore in ancient times been given the names Eveningstar and Morningstar. \n\nIf you see a star that sets or rises just hours before or after the sun and is exceptionally bright, you're with highest probability looking at our neighbour planet Venus.
920776
GoogleMoon and GoogleMars - not as good as Earth, Mars is quite hi-res though - and in false colour to see elevations better. Zoom in on GoogleMoon to see great detail ;)
153232
This site says the Martian Sky is butterscotch (yellowish brown):\n\nhttp://webexhibits.org/causesofcolor/14C.html\n\nThis page from the recent Mars rover missions say brownish grey:\n\nhttp://mars.jpl.nasa.gov/gallery/sky/PIA01547.html\n\nThe problem of calibrating the images to get a true color is not a simple one:\n\nhttp://mars.spherix.com/spie2003/SPIE_2003_Color_Paper.htm\n\nLook at pictures on the following sites:\n\nhttp://www.marsnews.com/\nhttp://marsrovers.nasa.gov/home/index.html\nhttp://mars.jpl.nasa.gov/gallery/martianterrain/PIA00563.html\n\nand they show a pinkish brown sky.\n\nAnd, Mars does indeed have a measurable atmosphere with climate changes.  It is only about 1% of that on earth but it is there and it consists mostly of carbon dioxide.  It is this atmosphere that supports dust storms on the planet and dust devils that have been imaged.\n\nhttp://mars.jpl.nasa.gov/science/climate/index.html\nhttp://seds.lpl.arizona.edu/nineplanets/nineplanets/mars.html\nhttp://marsprogram.jpl.nasa.gov/gallery/duststorms/index.html