Where did life on Earth originate? Did it form directly on our world billions of years ago? Or instead, was it an accidental gift from amongst the stars, reaching our planet on star dust?
The Universe is incredibly large. Vast empty stretches of space are dotted with a wide array of galaxies — huge cities of stars, each containing hundreds of billions of suns. Take a look at some of the most visually striking and profound galactic images.
To the ancients, planets were merely wandering points of light against a backdrop of fixed stars. The only moon they knew was that of our own Earth. With modern technology, we have seen each of these wanderers up close in all their grandeur and beauty.