Astrometrik

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Space, to scale

How far, how fast and how big: live distances, a speed race, real worlds and size comparisons.

How far away is everything right now?

Real distances for this second. Press send and watch one pulse of light crawl out to each world at its real speed, sped up so a whole hour fits in twelve seconds.

And which of these is actually fast?

What is fast out here?

Every bar is a real speed measured right now. Each one races the same stretch: Earth to the Moon. The clock speeds up as it runs, so watch the elapsed time, not the bars.

What do these worlds actually look like?

Real worlds, real imagery

Globes built from NASA mission maps, spinning in your browser.

Maps: NASA Blue Marble, NASA LRO, USGS Viking, NASA/JPL Cassini.

Which rockets are going up?

Hubble Deep Field photograph: thousands of distant galaxies on a black background

Hubble Deep Field

Almost every speck is a whole galaxy. This patch of sky is smaller than a tennis ball seen from 100 metres away.

Credit: NASA, STScI

Compare sizes

Pick something you know, then see how everything else measures up against it.