Positioned on an arm of the milky way galaxy, Earth is moving at an average speed of 515, 000 miles per hour or approximately 143 miles per second. Even at that speed, it takes 240 million years to complete one revolution around  the milky way.  

 The Planet Earth

The earth rotates every twenty four hours and orbits the sun every 365 days. The earth spins at a speed of 1037 miles per hour at the equator.  While orbiting around the sun at 67,000 miles per hour or 18.6 miles per second, the earth within the solar system travels 584 million miles per year. 

LOOKING BACK IN TIME

We can actually see back in time and watch the past unfold. The image to the left is of the farthest yet observed galaxies as seen by the Hubble Telescope.

The galaxy was born 420 million years after the big bang. The scene playing out actually happened 13.3 billion years ago, long before the earth had formed, when the universe itself was young.

The “Snap shot” back in time is of the light given off that day over 13 billion years ago by the galaxies which are so far away that it took the light traveling 186 thousand miles per second all those 13 + billion years ago, to reach us. Future generation telescopes will be able to see even farther back in time, very near to when (it is theorized) it all began.

MEET NASA


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