The star closest to the zenith depends on your location and the current time, as the location of stars in the sky changes throughout the night and with your position on Earth. The star that is currently at the zenith will be the one directly overhead in your local sky.
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No, zenith and the North Star are not the same. The zenith is the point directly above an observer, whereas the North Star (Polaris) is a star located near the celestial North Pole in the Northern Hemisphere, making it useful for navigation.
Yes, the zenith distance at upper culmination is less than the zenith distance at lower culmination. The zenith distance is the angle between the zenith (straight overhead point) and a celestial body. At upper culmination, the body is closest to the zenith, resulting in a smaller zenith distance. At lower culmination, the body is furthest from the zenith, leading to a greater zenith distance.
The sun is the closest star to our planet.that is why it looks so big.
Less than a degree from the zenith.
The imaginary point in the sky directly above an observer on Earth is called the zenith. It represents the highest point in the sky that an observer can see when looking straight up.