行星及月球英文版ppt課件-資料下載頁
2025-01-16 06:34本頁面
【正文】 e Roman God of War. ? They are quite small (15km) and look rather like potatoes than like moons. Moons Io, Callisto, Ganymed and Europa ? These four moons are the biggest moons of Jupiter. They can be seen with small telescopes or even with binoculars. Europa Io Plas of other stars Are there more plas in the Universe (except for the ones in the Solar System)? ? Yes, there are other plas, socalled extrasolar plas. But it is very difficult to spot them, since they are far far away. Plas of other stars How can plas of other stars be spotted? There are two main ways that astronomers search for these plas: ? If you observe a star very accurately with special instruments, you may be able to measure a slight “wobble“. This can indicate a pla. ? If you can observe many stars after night, you may sometimes see one get slightly fainter for a little while. This happens if a pla passes between us and the star – like a minieclipse. More Information SkyWatch links: ? Views of the Solar System ? The Nine Plas ? StarChild Celestia Exploration Activity: Solar System Exploration: Wele to the Plas:
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