Skywatch Line Archive

Skywatch Line for Monday July 26th and Tuesday July 27th, 2021

This is the Dudley Observatory’s Skywatch Line for Monday and Tuesday July 26th, and 27th, written by Joe Slomka. The Sun sets at 8:22 PM; night falls at 10:22. Dawn begins at 3:42 AM and ends with the Sun rising at 5:42. Monday, the Moon, in Aquarius, appears about 31 arc-minutes in size and appears 90% illuminated; it sets at 10:24 PM. Tuesday, it moves into Cetus, rising at 9:27 AM, slightly thinner and sets at 10:48 PM. Venus and Mars, in Leo, are still visible, but low in the West. First magnitude Mars sets at 9:28 PM, but only… Continue reading

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Skywatch Line for Friday, July 23, through Sunday, July 25, 2021

This is Dudley Observatory’s Skywatch Line for Friday, July 23, through Sunday, July 25, written by Sam Salem. On Friday, Sun rises at 5:38am and sets at 8:25pm; Moon sets at 4:37am and rises at 8:39pm. The Moon will reach its full phase on Friday at 10:37pm. July full Moon is often called the Buck Moon, Hay Moon or Thunder Moon. That’s because at this time of year buck deer begin to grow velvety antlers and farmers load hay in their barns amid the summer season’s frequent thunder showers. The Moon is full when it is opposite the Sun in… Continue reading

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Skywatch Line for Wednesday, July 21 and Thursday, July 22, 2021

This is Dudley Observatory’s Skywatch Line for Wednesday, July 21 and Thursday, July 22, written by Alan French. The Sun now sets at 8:34 p.m. and rises at 5:35 a.m. The days are slowly growing shorter. A waxing gibbous Moon now brightens the night sky. A 94% illuminated Moon will rise at 6:49 P.M. Wednesday. It will be 98% in sunlight when it rises at 7:54 Thursday, appearing essentially full. The Moon will reach full Friday night. There have been many reports of a reddish Moon and Sun due to smoke from the western forest fires. A friend in Pennsylvania,… Continue reading

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Skywatch Line for Monday July 19th and Tuesday July 20th, 2021

This is the Dudley Observatory’s Skywatch Line for Monday and Tuesday July 19th, and 20th, written by Joe Slomka. The Sun sets at 8:29 PM; night falls at 10:34. Dawn begins at 3:30 AM and ends with the Sun rising at 5:35. The 10-day-old Moon rises at 4:10 PM in southwestern Libra, is highest at 9 PM, 70% illuminated, and sets at 1:53 AM. Tuesday finds the Moon in Scorpius’ claws, rising at 5:27 PM, 32 arc-minutes in size, 80% lit and sets at 2:37 AM. Last week’s close encounter of Venus and Mars has dissolved. Venus continues to be… Continue reading

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Skywatch Line for Friday, July 16, through Sunday, July 18, 2021

This is Dudley Observatory’s Skywatch Line for Friday, July 16, through Sunday, July 18, written by Sam Salem. On Friday, Sun rises at 5:32am and sets at 8:31pm; Moon rises at 12:25pm. The Moon completes the first quarter of its orbit around Earth at 6:10am on Saturday. Its 90-degree angle away from the Sun will cause us to see the Moon half-illuminated on its eastern side. At first quarter, the Moon rises around mid-day and sets around midnight. As darkness falls on Friday and Saturday, the Moon introduces you to Spica, the brightest star to in the constellation Virgo the… Continue reading

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Skywatch Line for Wednesday, July 14 and Thursday, July 15, 2021

This is Dudley Observatory’s Skywatch Line for Wednesday, July 14 and Thursday, July 15, written by Alan French. The Sun now sets at 8:40 p.m. and rises at 5:27 a.m. A waxing crescent Moon now graces the evening sky. The Moon will be 25% illuminated on Wednesday night and set at 11:37 P.M. The visible face will be 35% in sunlight on Thursday night and set at midnight. The Moon will reach first quarter on Saturday morning, July 17. Mars and Venus continue to be visible in the early evening sky after sunset. At 9:30 P.M. brilliant Venus, at magnitude… Continue reading

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Skywatch Line for Monday July 12th and Tuesday July 13th, 2021

This is the Dudley Observatory’s Skywatch Line for Monday and Tuesday July 12th, and 13th, written by Joe Slomka. The Sun sets at 8:33 PM; night falls at 10:43. Dawn begins at 3:18 AM and ends with the Sun rising at 5:29. The waxing Moon occupies Leo on both nights. Monday, the Moon rose during daylight and sets at 10:40 PM, 9% illuminated and 30 arc-minutes in size. Tuesday, the Moon also rises during daylight and sets at 11:08 PM, fatter with 16% lit and 31 arc-minutes. By 9 PM, the Moon is about 6° high in the West on… Continue reading

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Skywatch Line for Friday, July 9, through Sunday, July 11, 2021

This is Dudley Observatory’s Skywatch Line for Friday, July 9, through Sunday, July 11, written by Sam Salem. On Friday, Sun rises at 5:26am and sets at 8:35pm; Moon rises at 4:43am and sets at 8:45pm. The Moon will reach its new phase on Friday at 9:17 pm. Low in the west-northwestern sky after sunset on Sunday, the young crescent Moon will shine a generous palm’s width to the right of bright Venus, and much fainter Mars. On the following evening, the Moon’s orbital motion will lift it to sit a similar distance above those two planets. Venus, at magnitude… Continue reading

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Skywatch Line for Monday July 5th and Tuesday July 6th, 2021

This is the Dudley Observatory’s Skywatch Line for Monday (Independence Day) and Tuesday July 5th, and 6th written by Joe Slomka. The Sun sets at 8:37 PM; night falls at 10:50. Dawn begins at 3:11 AM and ends with the Sun rising at 5:24. Monday finds the Earth furthest from the Sun, 152,100,527 KM (94,510,885 miles)- 3.4% more distant than in northern hemisphere Winter. Taurus hosts the Moon on both nights. The 25-day-old Moon sets at 4:54 PM on Monday, rises at 2:42 AM on Tuesday, sets at 5:56 PM and rises at 3:15 AM on Wednesday. Mars and Venus,… Continue reading

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Skywatch Line for Friday, July 2, through Sunday, July 4, 2021

This is Dudley Observatory’s Skywatch Line for Friday, July 2, through Sunday, July 4, written by Sam Salem. On Friday, Sun rises at 5:22am and sets at 8:37pm; Moon rises at 1:07am and sets at 1:50pm. When the waning crescent Moon rises around 2:00am in the east on Sunday, it will be positioned a slim palm’s width to the right of the magnitude 5.8 planet Uranus, close enough for them to share the view in binoculars. Try to find the planet before 4:30am before the brightening dawn sky overwhelm it. Mercury will be visible in the pre-dawn sky during much… Continue reading

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