What fraction of the sky could you see from the North Pole of the Earth? All of

Question

What fraction of the sky could you see from the North Pole of the Earth?

All of it

¼

2/3

Half

What fraction of the sky could you see from the Earth’s equator over the course of a year?

Half

¼

All of it

¾

A set of phases similar to those seen by Galileo for Venus are also technically possible for which planet?

Jupiter

Mars

Saturn

Mercury

Based of the figure below, match some of the visible constellations to the four seasons.

_____Taurus                                         1.Winter

_____Virgo                                            2. Summer

_____Sagittarius                                   3. Spring

Match the contribution to the astronomer

_____ Stellar Coordinates

_____ Distance of planets

_____ Heliocentric Model

_____ Size of Earth

_____Phases of Venus

_____ Moons of Jupiter

Nicolaus Copernicus

Galileo

Hipparchus

Eratosthenes

The Earth revolves around the Sun in 365.25 days. Because of this motion, the Sun appears to move through a 360-degree circle among the stars over this same time. How many degrees does the Sun move in a day with respect to the starts? Round the number.

360 degrees

2 degrees

1 degree

27 degrees

Why did Copernicus want to develop a completely different description of the Solar System? Give two reasons.

1.

2.

Cancer Gemini Taurus Leo Arie Virgo Pisces Sun Libra Aquarius Earth Capricornus June August Scorpius Sagittarius Ophiuchus

Explanation / Answer

1.From north pole we can see 1/2 (that part above the celestial equator).

2. From any location on the equator  you observe all of the stars during the course of a year

3.It was Galileo's observations of Venus that proved the theory. Using his telescope, Galileo found that Venus went through phases, just like our Moon. But, the nature of these phases could only be explained by Venus going around the Sun, not the Earth. Galileo concluded that Venus must travel around the Sun, passing at times behind and beyond it, rather than revolving directly around the Earth

4.Sun's movement:-

This number is calculated by taking the total degrees in a circle (360 deg, since the earth moves 360 degrees around the sun) and dividing that amount by the total number of days in a year (365.2422). The result is 360 deg / 365.2422 days to equal about 1 degree per day.

Copernicus :-

1.It positioned the Sun near the center of the Universe, motionless

2.Earth and the other planets rotating around it in circular paths modified by epicycles and at uniform speeds.

but later on planets were revolving in elliptical orbits.

1.taurus - summer

2.virgo - winter

3.Sagittarius - spring

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