Over the past two decades more than one thousand planets have been discovered outside our Solar System. What is even more interesting is that we have started to investigate atmospheres of these planets using telescopes both on the ground and in space. In this talk I will show how we can study the atmospheres of these alien worlds, and what we have learned from these observations.
How can we determine the age of a meteorite, or even the Solar System? How can we unravel the processes that formed Earth and the rest of the Solar System from the primordial dust cloud? The presence, or absence, of particular elements and isotopes in meteorites and their components, and the physics and chemistry of those elements, provides abundant clues to what happened in those first few million years.