Help With Homework

Could someone help with some astronomy questions I have? I think my
answers are correct. I just want to make sure.

I just discovered a new planet that orbits the sun between Uranus and
Neptune.
What law would you use to determine the orbital period of the new
planet?
answer. Copernicus

Does the planet take a longer or shorter time to orbit the Sun than the
Earth does?
answer. Longer

If the new planet rotates on its axis three times slower than the earth
does, what is the length of a day (our is 24 hours) on the new planet?
answer. 8 hours

I live somewhere north of the equator. In the summer I should not be
able to see Sagittarius. In the winter I should be able to see Gemini.
In the spring I should be able to see Virgo. In autumn I should not be
able to see Pisces.

In the summer Virgo is easily visible.

Thank you

"azazel scratch" wrote in message
...
Could someone help with some astronomy questions I have? I think my
answers are correct. I just want to make sure.

I just discovered a new planet that orbits the sun between Uranus and
Neptune.
What law would you use to determine the orbital period of the new
planet?
answer. Copernicus

Kepler's laws describe the orbital period, not Copernicus:

http://home.cvc.org/science/kepler.htm




Does the planet take a longer or shorter time to orbit the Sun than the
Earth does?
answer. Longer

If the new planet rotates on its axis three times slower than the earth
does, what is the length of a day (our is 24 hours) on the new planet?
answer. 8 hours

3 days.....



I live somewhere north of the equator. In the summer I should not be
able to see Sagittarius. In the winter I should be able to see Gemini.
In the spring I should be able to see Virgo. In autumn I should not be
able to see Pisces.

In the summer Virgo is easily visible.

Thank you

You might wish to reconsider your answers to the first and third
questions.
---Mac
******************************
On Tue, 31 Aug 2004 15:28:39 -0700, azazel scratch
wrote:

Could someone help with some astronomy questions I have? I think my
answers are correct. I just want to make sure.

I just discovered a new planet that orbits the sun between Uranus and
Neptune.
What law would you use to determine the orbital period of the new
planet?
answer. Copernicus

Does the planet take a longer or shorter time to orbit the Sun than the
Earth does?
answer. Longer

If the new planet rotates on its axis three times slower than the earth
does, what is the length of a day (our is 24 hours) on the new planet?
answer. 8 hours

I live somewhere north of the equator. In the summer I should not be
able to see Sagittarius. In the winter I should be able to see Gemini.
In the spring I should be able to see Virgo. In autumn I should not be
able to see Pisces.

In the summer Virgo is easily visible.

Thank you

azazel scratch wrote in
:

I live somewhere north of the equator. In the summer I should not be
able to see Sagittarius.

No, just the opposite. In the summer you SHOULD be able to see
Sagittarius, and you should not be able to see Orion.

In the winter I should be able to see Gemini.
In the spring I should be able to see Virgo. In autumn I should not be
able to see Pisces. In the summer Virgo is easily visible.

Yes, these are all true statements.

You've got a couple of these wrong. I've added notes against your original
message see below.

I just discovered a new planet that orbits the sun between Uranus and
Neptune.
What law would you use to determine the orbital period of the new
planet?
answer. Copernicus

The correct answer is Kepler's Law.

Copernicus came up with the The Heliocentric System. That's the name for the
idea that the planets go around the sun.

Kepler's Laws are more specific to the orbits of the planets.
The three laws are
1. The orbit of each planet is an ellipse with the sun at one focus of the
ellipse.
2. The speed at which planets travel. A line connecting a planet to the sun
will sweep out equal areas in equal times; Kepler's second law means that a
planet's orbital speed changes with its distance from the sun"
3. The ratio of the square of the revolutionary period (in years) to the
cube of the orbital axis (in astronomical units) is the same for all
planets.


Does the planet take a longer or shorter time to orbit the Sun than the
Earth does?
answer. Longer

Yep. That's right.


If the new planet rotates on its axis three times slower than the earth
does, what is the length of a day (our is 24 hours) on the new planet?
answer. 8 hours

You've got this backwards. If it's rotating slower it's day will take
longer. In this case the planets day is three times longer, so that's 72
Hours.


I live somewhere north of the equator. In the summer I should not be
able to see Sagittarius. In the winter I should be able to see Gemini.
In the spring I should be able to see Virgo. In autumn I should not be
able to see Pisces.

In the summer Virgo is easily visible.


I'll agree with that.

Thank you



Regards

Colin Dawson
www.cjdawson.com

In article ,
says...


I live somewhere north of the equator. In the summer I should not be
able to see Sagittarius. In the winter I should be able to see Gemini.
In the spring I should be able to see Virgo. In autumn I should not be
able to see Pisces.


I'll agree with that.


I wouldn't, at least not totally. You would have to live pretty far
north of the equator in order for Sag. to not be visible, say around
Anchorage Alaska.

And in Autumn you should most definitly see Pisces.