The reason it is approximate is that:
1/ If you are high up you will see a little more than 50% due to the curve of the Earth.
2/ If the land around you has hills they will block some of your view reducing the percentage a little.
Half.
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But the amount of it that you're ever able to see depends on where you live ...
specifically, your latitude, i.e. how far you are from the equator.
If you're at the north or south pole, then you see half of the entire sky whenever
it's dark enough. The center of it is directly over your head. Everything rotates
around that center, never getting any higher or lower off the horizon, and you
never see any of the other half. (By the way, since you're at the pole, you get
all of your dark time all at once. The sun is up for 6 months and down for 6
months, and it's probably dark enough to see stars for only maybe 4 or 5
months out of those six ... out of which 2 or 3 are too cold to go outside, or
the sky is overcast, or full of blowing snow. Astronomers do not pine for an
observatory at the north or south poles.) )
If you're on the equator, then you also see half of the entire sky whenever it's
dark enough. The center of it is on your northern (and southern) horizon.
Everything rotates around that center like a barrel, rising in the east, setting
in the west 12 hours later, and over the course of few months, you can see
everything in every part of the sky, at some time during the night.
If you're in between the equator and a pole, then you can see half of the entire
sky whenever it's dark enough. The center of it is somewhere on a slant between
your horizon and the point over your head. The angle between the horizon and
that center-point is the same angle as your latitude, and the whole sky turns
around that center.
Since the center-point is on a slant . . .
-- some things in the sky that are close enough to it never get low enough to set;
-- some things in the sky that are so far from it in the other direction never rise,
and you can never see them from where you are;
-- everything else in your sky, between these two circular areas, rises and sets.
The whole action shifts about 4 minutes earlier every night, so the parts that are
only up during the day right now will eventually be up during the night if you wait
a few weeks or months.
Half the sky, if you have a clear view (no mountains, for instance).
Half the sky, if you have a clear view (no mountains, for instance).
Half the sky, if you have a clear view (no mountains, for instance).
Half the sky, if you have a clear view (no mountains, for instance).
Half, minus the percentage of cloud cover. During the day, the atmospheric glare drowns out all but the Sun, Moon and (if it's up) Venus.
Unless your on the equator then you can see the entire Celestial Sphere
Right now? September 5, 2010? None at all; the Sun is still up at the North Pole, and will be until September 21. And the Sun won't be far enough below the horizon to see stars for another week or so after that. (Aside from the fact that there is nobody at the North Pole.)
After mid-October, if there were any people there to look, they would be able to see about half of all the visible stars.
No. An observer at the North Pole can see only half of the celestial sphere.
No matter where you are on Earth, there is only so much of the celestial sphere that you can see.
(Comments: Actually you can see the whole celestial sphere from the equator, but
you would not be able to see all the stars on any one particular night.)
It is all of the 88 constellations around the Earth forming a sphere.
0% of them. All stars visible from the north pole are at or below the horizon from the south pole and vice versa.
only one half of the sky that is north of the celestial equator is ever visible at the north pole
it depends on ware you live. how much light pollution there is.
It depends how much part of earth is in between sun and moon blocking sun's light as the moon is a sphere and earth's shadow causes it to look like being changing its shape.
The north celestial pole is not visible from any point on Earth's surface south of the equator. This is always true. The north celestial pole is the point in the sky directly above the Earth's north pole. Even though the north celestial poles moves about in the sky, it remains invisible everywhere in the southern hemisphere. The north celestial pole moves around in a circle in the sky as the Earth's axis wobbles. Each wobble takes about 23 thousand years.
A planet is defined as any celestial body which has enough matter to form itself into a sphere (or spheroid), but without enough mass to begin nuclear reactions. This definition has no relation to what the body is made of, so a gas planet is just as much a planet as one made of rock or one made of styrofoam.
Nothing ... unless it hits it. Since asteroids come in all sizes, the effect would (does) vary from a pretty light show in the sky to breaking the planet into pieces. (Worry not, gravity would quickly return the Earth into a glowing sphere of lava which would soon (a few billion years) become much like Earth is now.)
bout $20
The earth is a spherical shape and the volume of a sphere is: 4/3*pi*radius3
Half unless it is eclipsed, than it varies. When you shine a light on a sphere, half of it is lit up, try it. But when another celestial object gets in the way of the sun and it, the amount of light it receives varies. The Earth, Mercury, and Venus can get in its way.
No, the Earth is pretty much a sphere. It's not a PERFECT sphere, but you wouldn't be able to see the difference by eye. Because of the Earth's spin, it bulges out just a TINY bit along the equator.
It depends on the size of the sphere. volume of a sphere = (4pi/3)r³
The moon does not change (much). What an observer on Earth sees changes as the Moon orbits the Earth and the Earth/Moon system orbits the Sun much more slowly is the illuminated portion of the moon growing (covering more and more of the visible portion of the Moon) and when the Moon is full, the Sun Earth and Moon are more or less in line (if they were exactly in line it would be a lunar eclipse - which does happen a few times each year). Then as the Moon continues to rotate around the Earth, night after night, less and less of the illuminated portion is visible to the observer on Earth.
"Roundish" is the clear winner so far as I know.(The actual shape of Earth is not a sphere; it's a "geoid", but saying "Earth is a geoid" is pretty much a tautology, since it amounts to saying "Earth is Earth-shaped.")
It depends how much part of earth is in between sun and moon blocking sun's light as the moon is a sphere and earth's shadow causes it to look like being changing its shape.
The north celestial pole is not visible from any point on Earth's surface south of the equator. This is always true. The north celestial pole is the point in the sky directly above the Earth's north pole. Even though the north celestial poles moves about in the sky, it remains invisible everywhere in the southern hemisphere. The north celestial pole moves around in a circle in the sky as the Earth's axis wobbles. Each wobble takes about 23 thousand years.
Sphere grossed $50,168,294 worldwide.
there are many more plants and celestial bodies in our solar system, the milky way, then just earth and mars. theres the sun, mercury, venus, jupiter, saturn, uranus, neptune, pluto, astroids and comets, shooting stars, and much, much more.
Assuming you mean "How much of the water on Earth is fresh water", about 5% of the water on the Earth is fresh water, as opposed to about 95% salt water. To anser your question directly though, 100% of the fresh water we know about is on Earth. There is some water on other celestial bodies, but I wouldn't exactly call it fresh water.
The Sun's total energy crosses a sphere with a radius of 149.6 million km at the distance of the Earth, and the area of that sphere is 2.812E17 square kilometres. From that the Earth intercepts a circular area with a radius of 6178 km, with an area of 1.2E8 square km. So the maximum possible proportion of the Sun's energy intercepted by the Earth is 1.2E8 / 2.18E17 which is 5.5E-10 or .000000055%.