دانلود کتاب سفری در سراسر جهان

This is a journey into space. On board a spacecraft of advanced design we will visit the highlights of the known universe – swooping among the hundreds of quirky worlds in our own solar system, then out into the Milky Way to meet seething unstable stars and exotic exoplanets, through the mysteries of the intergalactic void, to far-flung galaxies where giant black holes shine, and beyond to the exploding stars and collisions that create some of the most distant beacons we can see. For convenience, our embarkation point will be nearby, a mere 499 light seconds away, at an astronomical object that has been observed ever since eyes evolved.