Science, Maths & Technology
Live long and prosper?
...systems are by no means all like our own familiar Solar System. We know that the Sun is orbited by four close-in, rocky planets (Mercury, Venus, Earth and ars), then there is an asteroid belt containing millions of small rocky bodies. Further out still are four gas-giants (Jupiter, Saturn, Uranus & Neptune) each accompanied by dozens of rocky moons, and then another...