Mercury at Greatest Elongation
Mercury will reach its greatest separation from the Sun in its Jun–Jul 2021 morning apparition. It will be shining brightly at mag 0.3.
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Conjunction of Venus and Jupiter
Jupiter and Venus will appear less then 1° apart in the eastern predawn sky on April 30th.
Partial Solar Eclipse
On Saturday, April 30, 2022, people in parts of southern South America, Antarctica, and the Pacific and Southern Oceans will have a chance to witness a partial eclipse of the Sun just before and during sunset.
New Moon
New Moon. By the modern definition, New Moon occurs when the Moon and Sun are at the same geocentric ecliptic longitude. The part of the Moon facing us is completely in shadow then. Pictured here is the traditional New Moon, the earliest visible waxing crescent, which signals the start of a new month in many […]
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Eta-Aquariid Meteor Shower
The Eta Aquariids are a strong shower when viewed from the southern tropics. From the equator northward, they usually only produce medium rates of 10-30 per hour just before dawn. Activity is good for a week centered the night of maximum activity. These are swift meteors that produce a high percentage of persistent trains, but […]
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Astronomy Day
Astronomy Day is an international event observed each fall and spring near the first quarter Moon. Local astronomical societies, planetariums, museums, and observatories sponsor public viewing sessions, presentations, workshops, and other activities to increase public awareness about astronomy and our wonderful universe.
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First Quarter Moon
The Moon is at First quarter on this date -it will be visible high in the southern sky in early evening.
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Full Moon
The Full Moon rises at sunset, and is visible all night. The Vatican Observatory's monthly Full Moon Meetup for Sacred Space Astronomy subscribers is held at 10:00 AM Tucson time.
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Inf. Conjunction of Mercury
Mercury passes very close to the Sun in the sky as its orbit carries it between the Sun and Earth. This happens once in 116 days (the synodic cycle of the planet), and over the course of a couple weeks, Mercury will change from appearing in the evening sky to appearing in the morning sky.
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Last Quarter Moon
The Moon is at Last Quarter (or Third Quarter) – rising around midnight, and visible to the south after sunrise.
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Conjunction of the Moon and Venus
The Waning Crescent Moon appears 8° from Venus in the eastern predawn sky.
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Conjunction of Mars and Jupiter
Mars and Jupiter appear less than 1° apart in the eastern predawn sky
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New Moon
New Moon. By the modern definition, New Moon occurs when the Moon and Sun are at the same geocentric ecliptic longitude. The part of the Moon facing us is completely in shadow then. Pictured here is the traditional New Moon, the earliest visible waxing crescent, which signals the start of a new month in many […]