Chapter P7 - Observing the Universe
National Schools' Observatory
- NSO the sky tonight, see how the sky changes throughout the evening.
- NSO day and night, see the Sun and stars rise and set over 24 hours; see this in spring, summer, autumn and winter.
- NSO electric orrery, explore the retrograde motion of Mars. Next period of retrograde motion is Feb - May 2012.
- NSO stars How far away are the stars? How are they formed and how do they die? Are all stars the same? What keeps them shining?
Structure of a Star
Behaviour of (Ideal) Gases
Try this PhET simulation of a gas. You can investigate all the gas laws - Boyle's law (constant temperature); Charles's Law (constant pressure); the pressure law (constant volume).
More simulations and animations here: