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Being very nearly spherical (shaped like a round ball), it's kind of tough to say that
the Earth "is tilted" ... a tilted ball is still a ball.
The Earth's rotation axis points toward a spot in the sky that's very near the star Polaris.
In that direction, the axis makes an angle of about 67.5 degrees to the ecliptic, the plane of the Earth's orbit around the Sun.
When you see a drawing of the Sun and the Earth in its orbit around it, you're tempted
to assume that the Earth's north pole points straight up, making a right angle with the
direction toward the sun. There's really no reason why it ought to point that way, or
why it should tilt at an angle of 42 degrees, or 87 degrees, or zero, or any other angle.
It just happens to be about 67.5 degrees.
If it were 90 degrees, then earth would have no seasons. And if it were much less
than it actually is, then the seasons might be so extreme that life on Earth might be
almost impossible.
The ecliptic - the plane in which the orbits of all the planets including Earth lies - is also tilted with respect to the Galactic Equator (about 60 degrees) The mass of the galaxy is so great that reasonably that should be a frame of reference but in space there is no up and down!
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RafaIf you live north of the equator, at the beginning of summer, the north pole is tilted towards the Sun, at the beginning of winter, the north pole is tilted away from the Sun. At the beginning of spring and fall, the axis is in an intermediate position.
Actually the position of the axis doesn't change significantly in a year; it always points towards the same point in the sky. What changes is the Earth's position in relation to the Sun.
When Spring starts in the northern hemisphere - somewhere around March 21 - the northern part of Earth's axis is tilted towards the Sun; the southern part, away from the Sun. When Spring starts in the Southern Hemisphere - somewhere around September 22 - it is the opposite.
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During summer which way is the earths axis tilted?
During summer in the northern hemisphere, the Earth's axis is tilted towards the Sun. This results in longer days and higher temperatures in the northern hemisphere.
Why autumn and spring seasons occur in opposite hemispheres alternately?
Because - the Earth is tilted on its axis - by about 11 degrees. This means that, when the northern hemisphere is tilted towards the sun, the Southern Hemisphere is tilted away. This - combined with the position of the sun in its orbit around the Sun - creates our seasons.
Is the winter solstice tilted toward the sun?
At both the winter and summer solstices, the Earth is tilted towards the sun. What differs is which hemisphere is tilted towards the sun. In the northern hemisphere at its winter solstice, the southern hemisphere is tilted towards the sun, while the northern hemisphere it tilted away from the sun. In the southern hemisphere at its winter solstice, the northern hemisphere is tilted towards the sun, while the southern hemisphere it tilted towards the sun. When it is the winter solstice in one hemisphere, it is the summer solstice is in the other hemisphere. For a winter solstice, that particular hemisphere is tilted away from the sun.
Why do we have seasons'?
We have seasons because Earth is tilted on its axis and it revolves around the sun. During May, June, and July, the northern hemisphere is exposed to more direct sunlight because the hemisphere faces the sun. The same is true of the Southern Hemisphere in November, December, and January. It is the tilt of the Earth that causes the Sun to be higher in the sky during the summer months.
During which season is the sunlight more direct on the northern hemispher and why?
The sunlight is more direct on the northern hemisphere during the summer season. This is because the Earth's axis is tilted towards the sun during this time, causing the sunlight to hit the northern hemisphere more directly, resulting in longer days and warmer temperatures.
