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Mercury begins to emerge from the dawn glow after Aug. 12. On Aug. 19, Mercury reaches its greatest elongation west of the ...

This is M31, the Andromeda Galaxy. M31 is a large spiral galaxy that’s only 2.5 billion light years away from us. With a ...

Even though Venus moves between the Earth and sun every 19.5 months, it becomes visible after sunset and before sunrise only around every eight years, according to EarthSky.

The best time to spot Venus for stargazers in the U.S. is during the pre-dawn hours on May 31 and June 1, when the planet will appear as a bright, magnitude -4.3 morning star rising over the ...

Although their orbits keep them relatively stable with Venus, some still pass within 0.05 astronomical units of Earth's orbit.