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The mean time for the Sun to collide with another star in the solar neighborhood is approximately 30 trillion (3 × 10 13) years, which is much longer than the estimated age of the Universe, at approximately 13.8 billion years. This can be taken as an indication of the low likelihood of such an event occurring during the lifetime of the Earth.
On a prograde planet like the Earth, the sidereal day is shorter than the solar day. At time 1, the Sun and a certain distant star are both overhead. At time 2, the planet has rotated 360° and the distant star is overhead again (1→2 = one sidereal day). But it is not until a little later, at time 3, that the Sun is overhead again (1→3 = one solar day). More simply, 1→2 is a complete ...
Gordon Smart. Gordon Smart (born 31 March 1980 in Edinburgh and raised in Kinross) is a Scottish broadcaster and former journalist who was the editor of the Scottish Sun. He presents an evening show on BBC Radio 5 Live .
At 2:16 a.m., the sun finally dipped below the horizon, marking the first official night in 83 days for Utqiaġvik, Alaska, the northernmost town in the United States. Utqiaġvik, formerly ...
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A sundial is a horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate (the dial) and a gnomon, which casts a shadow onto the dial.
Ignoring the influence of other Solar System bodies, Earth's orbit, also called Earth's revolution, is an ellipse with the Earth–Sun barycenter as one focus with a current eccentricity of 0.0167. Since this value is close to zero, the center of the orbit is relatively close to the center of the Sun (relative to the size of the orbit).