right ascension and declination of the point in the sky
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Question 1
What are the right ascension and declination of the point in the sky where the ecliptic and the celestial equator intersect in March each year? The Sun crosses this point from the Southern Hemisphere to Northern Hemisphere in the sky.
R.A. = _____ H _____ M
Declination = __________ degrees __________ minutes (+,N; -, S)
Question 2
What is the name given to this point in space?
Question 3
Against what constellation does the Sun appear to be projected in the sky when it is located at this point?
Question 4
Now change the view from Earth looking toward the Sun, to that of the Sun looking toward the Earth. Use the blue direction buttons (Hint: Look 180 degrees from Sun. Turn on the equatorial grid, if necessary, and move 12 H in right ascension eastward). Against what constellation would the Earth appear to be projected when viewed from the Sun on the date in Question 1?
Question 5
What time of day would the constellation in Question 4 appear to be on your local celestial meridian?
Question 6
On what date does the Sun appear to be 23.5 degrees North of the celestial equator?
Question 7
What are the right ascension and declination of the point in Question 6?
R.A. = _____ H _____ M
Declination = __________ degrees __________ minutes (+,N; -, S)
Question 8
What is the name of this point in space?
Question 9
Against what constellation does the Sun appear to be projected on the date in Question 6?
Question 10
Now change the view from Earth looking toward the Sun, to that of the Sun looking toward the Earth. Use the blue direction buttons again (Hint: Look 12 H in right ascension eastward). Against what constellation would the Earth appear to be projected when viewed from the Sun on the date in Question 6?
Question 11
What time of day would the constellation in Question 10 appear to be on your local celestial meridian?
Question 12
What are the right ascension and declination of the point in the sky where the ecliptic and the celestial equator intersect in September each year? The Sun crosses this point from the Northern Hemisphere to Southern Hemisphere in the sky.
R.A. = _____ H _____ M
Declination = __________ degrees __________ minutes (+,N; -, S)
Question 13
What is the name given to this point in space?
Question 14
Against what constellation does the Sun appear to be projected when it is located at this point in the sky?
Question 15
Now change the view from Earth looking toward the Sun, to that of the Sun looking toward the Earth (use the blue directional buttons again). Against what constellation would the Earth appear to be projected when viewed from the Sun on the date in Question 12?
Question 16
What time of day would the constellation in Question 15 appear to be on your local celestial meridian?
Question 17
On what date does the Sun appear to be 23.5 degrees south of the celestial equator?
Question 18
What are the right ascension and declination of the point in Question 17?
R.A. = _____ H _____ M
Declination = __________ degrees __________ minutes (+,N; -, S)
Question 19
What is the name of this point in space?
Question 20
Against what constellation does the Sun appear to be projected on the date in Question 17?
Question 21
Now change the view from Earth looking toward the Sun, to that of the Sun looking toward the Earth (use the blue directional buttons again). Against what constellation would the Earth appear to be projected when viewed from the Sun on the date in Question 17?
Question 22
What time of day would the constellation in Question 21 appear to be on the local celestial meridian?
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Solution Summary
The solution explains right ascension and declination of the point in the sky. Celestial meridians are discussed.
Solution Preview
Question 1
What are the right ascension and declination of the point in the sky where the ecliptic and the celestial equator intersect in March each year? The Sun crosses this point from the Southern Hemisphere to Northern Hemisphere in the sky.
R.A. = __0___ H ___0__ M
Declination = ____0______ degrees ____0______ minutes (+,N; -, S)
Question 2
What is the name given to this point in space?
Vernal Equinox
Question 3
Against what constellation does the Sun appear to be projected in the sky when it is located at this point? Pisces
Question 4
Now change the view from Earth looking toward the Sun, to that of the Sun looking toward the Earth. Use the blue direction buttons (Hint: Look 180 degrees from Sun. Turn on the equatorial grid, if necessary, and move 12 H in right ascension eastward). Against what constellation would the Earth appear to be projected when viewed from the Sun on the date in Question 1?
Virgo (basically the opposite solstice or equinox)
Question 5
What ...
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