Several times a year near the moon’s first quarter phase, small clair-obscur effect features on the moon called the Lunar X and the Lunar V become visible in strong binoculars and backyard telescopes for a few hours. The Lunar X, a prominent X-shaped pattern, appears when the rims of the craters Purbach, la Caille, and […]
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Monthly Night Sky information provided by Chris Vaughan (@Astrogeoguy) at Starry Night Education (@StarryNightEdu).
Astronomical Events
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The moon will complete the first quarter of its orbit around Earth, measuring from the previous new moon, on Wednesday, July 2 at 3:30 p.m. EDT or 12:30 p.m. PDT, which converts to 19:30 GMT. The 90 degree angle formed by the Earth, sun, and moon at that time will cause us to see our […] |
3 events,On Thursday, July 3 at 4:00 p.m. EDT, 1:00 p.m. PDT, or 20:00 GMT, Earth will reach aphelion, its greatest distance from the sun for this year. Aphelion’s 94.51 million miles (152.09 million km) distance is 1.67% farther from the sun than the mean Earth-sun separation of 92.96 million miles (149.6 million km), which is […]
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After sunset on Thursday evening, July 3, Mercury (orbit shown in red) will stretch to its widest separation of 25.9 degrees east of the sun, and its maximum visibility, for its current apparition. This appearance of the planet will be reasonably good for both Northern Hemisphere and Southern Hemisphere observers. The optimal viewing time at […]
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When the sky darkens after dusk on Thursday, July 3, Virgo’s brightest star Spica will appear just to the upper right of the waxing gibbous moon in the southwestern sky. Until they set after midnight, the duo will share the view in binoculars (orange circle). Observers viewing the pair later, or in more westerly time […] |
1 event,The brilliant planet Venus will dominate the eastern predawn sky for most of this year while it slowly swings back toward the sun. On the mornings surrounding Friday, July 4, Venus will pass close enough to Uranus to allow early risers to use Venus to locate the far fainter planet in binoculars (orange circle). On […] |
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On Saturday night, July 5, the terminator on the waxing gibbous moon will fall just west of Sinus Iridum, the Bay of Rainbows. The circular 155 mile (249 km) diameter feature is a large impact crater that was flooded by the same basalts that filled the much larger Mare Imbrium to its east – forming […] |