It'll still be tough to spot, however.
tonight. It will rise at 6:59 a.m. EDT and set at 9:12 p.m. EDT , according to In the Sky.
Mercury's apparitions, the periods during which it is visible in the sky, occur roughly once every three to four months. These periods of visibility alternate between mornings and evenings, depending on what side of the sun Mercury is on relative to Earth. If the planet is on the east side of our star, it rises and sets just after the sun, meaning it is visible in early evenings and during twilight — an evening apparition. When Mercury is to the west of the sun, it rises and sets before the star and is visible shortly before sunrise — a morning apparition.
Viewing details vary from apparition to apparition. For example, the height to which Mercury climbs over New York City, varies between 9 degrees and 21 degrees at sunset during evening apparitions, according to. This depends on the time of year and is the result of Mercury crossing an imaginary line in the sky called the ecliptic, which marks the path Earth and the other major planets take through the sky and past the constellations of the zodiac.
The separation between the sun and Mercury during periods of greatest elongation is along the ecliptic. At different times of the year, however, the sun's path through the sky meets the horizon at different angles during sunset. This results in Mercury appearing at different attitudes over the horizon. , for instance, the ecliptic is at its steepest angle to the horizon, according to In the Sky.
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