Where are day and night always if almost equal length and why?
Answers
Equinox" literally means "equal night", giving the impression that the night and day on the equinox are exactly the same length; 12 hours each. But this isn't entirely accurate.
Equinoxes and solstices happen twice a year.
Equinoxes and solstices mark the start of astronomical seasons. The equinoxes start spring and fall, while solstices start astronomical summer and winter.
Even if the name suggests it and it is widely accepted, it is not entirely true that day and night are exactly equal on the equinox – only nearly.
Earth spins around its own axis approximately every 24 hours (a sidereal day is 23 hours, 56 minutes, 4 seconds).
The time it takes Earth to orbit once around the Sun is around 365 days, 5 hours, 48 minutes and 45 seconds (365.242189 days). And, like two spinning tops connected at the tips, it also wobbles around on its axis, making a complete rotation every 26,000 years (axial precession).
Earth is actually tilted at an angle of around 23.4 degrees toward the celestial pole, which is a certain point in the sky. As Earth makes its yearly orbit, 1 hemisphere faces the sun more than the other, the side that has summer.
On any other day of the year, the Earth's axis also tilts a little away from or towards the Sun. However, the equinoxes marks the exact moment twice a year when the Earth's axis is not tilted toward or away from the Sun at all. However, the axial tilt of around 23.4 degrees, remains the same.
Hope this helps
Answer:
Explanation:
Equinox" literally means "equal night", giving the impression that the night and day on the equinox are exactly the same length; 12 hours each. But this isn't entirely accurate.
Equinoxes and solstices happen twice a year.
Equinoxes and solstices mark the start of astronomical seasons. The equinoxes start spring and fall, while solstices start astronomical summer and winter.
Even if the name suggests it and it is widely accepted, it is not entirely true that day and night are exactly equal on the equinox – only nearly.
Earth spins around its own axis approximately every 24 hours (a sidereal day is 23 hours, 56 minutes, 4 seconds).
The time it takes Earth to orbit once around the Sun is around 365 days, 5 hours, 48 minutes and 45 seconds (365.242189 days). And, like two spinning tops connected at the tips, it also wobbles around on its axis, making a complete rotation every 26,000 years (axial precession).
Earth is actually tilted at an angle of around 23.4 degrees toward the celestial pole, which is a certain point in the sky. As Earth makes its yearly orbit, 1 hemisphere faces the sun more than the other, the side that has summer.
On any other day of the year, the Earth's axis also tilts a little away from or towards the Sun. However, the equinoxes marks the exact moment twice a year when the Earth's axis is not tilted toward or away from the Sun at all. However, the axial tilt of around 23.4 degrees, remains the same.