Astro flashcards, combined

Mean diameter of the earth

13000km

1st layer of the earth

Crust

2nd layer of the earth

Mantle

3rd layer of the earth

Outer core

4th layer of the earth

Inner core

Thickness of the crust

0-70km

Outercore temp

~5000k

Inner core temp

~5500k

Amount the the mantle takes up in the earth

~80%

Why do tectonic plates move?

The thermal convention currents in the upper mantle move

Constellation def (Question)

A group of stars forming a recognizable pattern (Anwser)

Asterism def (Question)

A prominent group of stars that is not a constellation (Answer)

How many constellations are there (Question)

88 (Answer)

How many stars are in Cassiopeia (Question)

5 (Answer)

How do you find the star ‘Sirius’ from Orion (Question)

The three stars in Orions belt points down to Sirius

What two stars are used to find Polaris in the plough

Dubhe and Merak

How do you find Polaris using the plough?

Draw a line from Merak to dubhe and follow it to usra minor and Polaris

What is right accession measured in?

Hours, minutes, seconds

What is right ascension?

Right ascension is the longitude on the celestial sphere, its the distance of a point east from the point of aries

How long is a ‘sidereal day’

23h 56m long