Celestial Navigator – July 2015


Wednesday, July 8, 4:24 p.m. EDT  Last Quarter Moon

The Last Quarter Moon rises around 1:30 a.m. and sets around 1:30 p.m. It is most easily seen just after sunrise in the southern sky.

Wednesday, July 15, 9:24 p.m. EDT  New Moon

The moon is not visible on the date of New Moon because it is too close to the sun, but can be seen low in the east as a narrow crescent a morning or two before, just before sunrise. It is visible low in the west an evening or two after New Moon.

Friday, July 24, 12:04 a.m. EDT  First Quarter Moon

The First Quarter Moon rises around 1:15 p.m. and sets around 12:30 a.m. It dominates the evening sky.

Second Full Moon, July 2015

Friday, July 31, 6:43 a.m. EDT  Full Moon

This is the second Full Moon in July, what is sometimes called a “Blue Moon.” It rises around sunset and sets around sunrise; this is the only night in the month when the moon is in the sky all night long. The rest of the month, the moon spends at least some time in the daytime sky.


Uranus and the Moon

Wednesday/Thursday, July 8/9, dawn

The moon will be close to Uranus just before sunrise. In the lands surrounding the Indian Ocean, the moon will actually occult Uranus.

Venus at greatest brilliancy

Thursday, July 9, dusk

Venus reaches its greatest brilliancy at magnitude –4.7.

Aldebaran and the Moon

Sunday, July 12, sunrise

The waning crescent moon will pass close to the bright red star Aldebaran low in morning twilight. The moon will occult Aldebaran as seen from eastern Russia, northern Japan, Alaska, northern Canada, Greenland, and Iceland.

Venus and the Moon

Saturday, July 18, dusk

The moon will be close to Venus just after sunset. Venus will appear in binoculars as a tiny crescent just north of the crescent moon. The moon will occult Venus as seen from New Guinea, northeastern Australia, Melanesia, and French Polynesia.

Ceres at opposition

Saturday, July 25, 4 a.m. EDT

Ceres, the largest asteroid or smallest dwarf planet, will be in opposition to the sun. At magnitude 7.5, it will be located right on the border between Sagittarius and Microscopium, just south of Capricornus.


Mercury is well placed in the eastern sky at dawn for the first half of the month for observers in the Southern Hemisphere.

Venus shines high in the western sky after sunset, reaching its greatest brilliancy from the sun on July 9.

Mars is too close to the sun to be visible.

Jupiter is low in the western evening sky all month, close to Venus on the 1st and 31st of the month.

Saturn is well placed in Libra in the evening sky.

Uranus rises near midnight in Pisces.

Neptune rises in the late evening in the constellation Aquarius.

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