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How far away is Mars — or, looking at it another way, how close is it? The exact answer varies, of course, as both it and our planet are constantly moving along their own orbits around the Sun. At the time of this writing Mars is on the other side of the Sun from us, 2.413 AU away as the space crow flies (which equates to nearly 361 million km or 224.3 million miles) and, back in 2003, Mars and Earth were at their closest in 50,000 years at a scant 56 million km/33.9 million miles apart. So on average, Mars is about 225 million km/140 million miles from Earth. Give or take a few.
But to most people (myself included) those are all just numbers. Big numbers — and really not even all that big in an astronomical sense. Just peanuts compared to space. (Thank you Mr. Adams.) So to give a sense of what it means to cross the distance between here and Mars, interactive designer David Paliwoda created a web page that illustrates the scale involved quite nicely. If our entire planet were reduced to a sphere 100 pixels in diameter, and you could travel outward at a velocity of 7,000 pixels/second, how far would Mars be? Find out here.
The Solar System is a big place — don’t let those elementary school science class posters fool you! (And for another idea of scale distances between the planets, check out Margot Trudell’s page OMG Space.)
HT to Gizmodo