Earthshine Moon Below Jupiter (after sunset)
In the western sky after sunset on Monday, March 31, the very slender crescent of the young moon will resemble the Cheshire Cat’s smile when it shines below bright Jupiter…
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Monthly Night Sky information provided by Chris Vaughan (@Astrogeoguy) at Starry Night Education (@StarryNightEdu).
Calendar of Events
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Crescent Moon Crosses the Pleiades (evening)
Crescent Moon Crosses the Pleiades (evening)
Once the has sky darkened on Tuesday evening, April 1, look in the lower part of the western sky, where the bright little Pleiades Star Cluster (aka The Seven Sisters,…
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Pretty Moon Joins Jupiter (evening)
Pretty Moon Joins Jupiter (evening)
Another 24 hours of eastward orbital motion will place the slightly fuller crescent moon less than a palm’s width to the upper right (or 5 degrees to the celestial north)…
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Lunar Craters Theophilus, Cyrillus, and Catharina (evening)
Lunar Craters Theophilus, Cyrillus, and Catharina (evening)
On Thursday evening, April 3, the terminator boundary that separtes the moon’s lit and dark hemispheres will fall just to the left of a trio of large craters named Theophilus,…
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Club Monthly Meeting – Malcolm Park
Club Monthly Meeting – Malcolm Park
Join us Thursday April 3 for our monthly meeting. For more information, see April 3 Meeting - The Atacama Backyard Observatory by Malcom Park - RASC Hamilton
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First Quarter Moon Approaches Mars (overnight)
On Friday night, April 4 in the western evening sky, the half-full moon will shine a fist’s diameter below (or 10 degrees to the celestial west of) the red planet…
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The Winter Triangle (evening)
The Winter Triangle (evening)
The lower part of the southwestern sky on early April evenings is dominated by the three bright stars of the Winter Triangle. The prominent asterism, which is visible even while…
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The Aristarchus Plateau (all night)
Three prominent craters break up the expanse of Oceanus Procellarum, the widespread dark region on the moon’s left-hand side. Large Copernicus is the easternmost of the craters. Its extensive, ragged…
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Venus Gleams above Mercury and Saturn (before sunrise)
Venus Gleams above Mercury and Saturn (before sunrise)
During the early part of April, the planets Venus, Mercury, Neptune, and Saturn will all be gathered above the eastern horizon before sunrise. Neptune is far too faint to compete…
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Mini Full Pink Paschal Moon Occults Spica (at 5:22 pm EDT)
Mini Full Pink Paschal Moon Occults Spica (at 5:22 pm EDT)
The moon will officially reach its full phase on Saturday, April 12 at 8:22 p.m. EDT or 5:22 p.m. PDT, which converts to 00:22 GMT on Sunday. Around that time,…
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Moon Moves Through the Scorpion’s Claws (overnight)
When the bright, waning gibbous moon clears the trees to the southeast in late evening on Tuesday, April 15, it will be shining close to the line of medium-bright stars…
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Bright Moon Covers Antares (overnight)
On Wednesday evening, April 16, observers in a zone extending from the southern Atlantic Ocean, the southern part of Africa, the Kerguelen Islands, and eastern Antarctica can watch the motion…
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The Whirlpool and Pinwheel Galaxies (all night)
On evenings during mid-April, the Big Dipper is positioned nearly overhead with its handle pointed down to the east. On this week’s moonless nights, two impressive galaxies can be seen…
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Ursa Major Galaxies (all night)
The Big Dipper asterism and its home constellation of Ursa Major are very high in the northern sky in late evening during mid-April - ideal for observing the spectacular galaxies…
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Mercury at Greatest Western Elongation (before sunrise)
Mercury at Greatest Western Elongation (before sunrise)
On Monday, April 21, Mercury (orbit shown in red) will reach its greatest angle of 27.4 degrees from the morning sun and maximum visibility for its current morning apparition. With…
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Third Quarter Moon (at 01:35 GMT)
Third Quarter Moon (at 01:35 GMT)
The moon will reach its third quarter phase on Monday, April 21 at 01:35 GMT, which converts to 9:35 p.m. EDT or 6:35 p.m. PDT on Sunday, April 20. Third…
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Lyrids Meteor Shower Peak (overnight)
The annual Lyrids meteor shower, derived from particles dropped by comet C/1861 G1 (Thatcher), runs from April 16 to 29. It will peak in intensity at approximately 9 am EDT…
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Old Moon Shines with Venus and Saturn (pre-dawn)
Old Moon Shines with Venus and Saturn (pre-dawn)
On Thursday morning, April 24, early risers can look low in the eastern sky for the pretty sight of the waning crescent moon shining a fist’s diameter to the right…
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Crescent Moon Meets Planets (before sunrise)
Crescent Moon Meets Planets (before sunrise)
After 24 hours of additional eastward orbital motion, the very slim crescent of the old moon will shine within a triangle composed of three planets before sunrise on Friday morning,…
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Friday Night Sights
Friday Night Sights
Join us (weather permitting) at our Observatory! See Friday Night Sights: Explore the Night Sky - RASC Hamilton for the latest updates on the upcoming date.
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Venus at Greatest Illuminated Extent (pre-dawn)
Venus at Greatest Illuminated Extent (pre-dawn)
On Sunday, April 27, Venus will reach its greatest illuminated extent for the current morning apparition. In a telescope (inset), the planet will show a surprisingly slender, 26%-illuminated, waxing crescent…
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New Moon (at 19:31 GMT)
New Moon (at 19:31 GMT)
The moon will reach its new phase on Sunday, April 27 at 3:31 p.m. EDT or 12:31 p.m. PDT or 19:31 GMT. At that time our natural satellite will be…
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Venus Shines above Saturn (pre-dawn)
Venus Shines above Saturn (pre-dawn)
In the eastern sky before dawn in late April, the orbital motion of the brilliant planet Venus will be carrying it past 240 times fainter Saturn. On the mornings before…
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Crescent Moon Jumps Jupiter (evening)
Crescent Moon Jumps Jupiter (evening)
In the western sky after dusk on Tuesday, April 29, the waxing crescent moon will shine prettily a fist’s diameter to the lower right (or 11 degrees to the celestial…
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The Three Leaps of the Gazelle (all night)
The large and bright constellation of Ursa Major, the Great Bear is at the zenith after dusk in late April. Everyone is familiar with the Big Dipper asterism portion of…
