ASTR1002 Mystery Object Tute. Patterns in the Night Sky Imagine, once again, that you live in Mog, where the clouds recently cleared (for the first time.

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Presentation transcript:

ASTR1002 Mystery Object Tute

Patterns in the Night Sky Imagine, once again, that you live in Mog, where the clouds recently cleared (for the first time in history) giving you a view of the sky for the first time. You now know that Mog is a sphere, spinning on its axis and orbiting its Sun. You know that stars appear to circle the celestial pole roughly once a day (actually travelling 361 degrees around in a 24 hour period). But now, you’ve seen something rather strange in the twilight sky. Every two weeks, during the last month or so, you’ve been out just after sunset, looking towards where the Sun has just set. You live on the equator.

Six weeks ago

Four weeks ago

Two weeks ago

Tonight

Explain what you see! Your job, working in groups, is to explain what you see. You should thing about the pictures and what they mean for a bit.