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The answer to today’s GUESS THAT ASTERISM is – The Summer Triangle!
 
As its name suggests, this popular star pattern is a simple triangle formed by three brilliant stars – Vega, Altair and Deneb. A resident of the Lyra Constellation and easy to find in the eastern sky, Vega is a blue-white beauty that is the brightest in the trio and the fifth brightest star in the sky. A member of the Cygnus Constellation, Deneb lies to the lower left of Vega. Although the blue-white supergiant is the least bright member of the asterism, it is actually the most luminous. Its distance is what gives it its third place ranking. To the lower right of Vega, you can find the fast-rotating Altair, an oblate spheroid that is the brightest star in the Aquila Constellation.
 
Although they are worthy sights, these three stars are not the only reasons to check out the Summer Triangle. Another notable stellar offering is the amazing double star Albireo that awaits in the middle of the triangle. When viewed through a telescope, this point of light becomes a wonderful contrasting pair made up of a blazing golden yellow star and a subtle blue star. Deep sky favorites lurking in the neighborhood include the appropriately named Ring Nebula (M57), which blooms around a bluish dwarf, and the hourglass-shaped Dumbbell Nebula (M27), which was the first planetary nebula ever discovered.
 
In addition to all of these treats, a truly grand sight will be revealed under a dark sky when you see the dusty, glowing Milky Way cutting a stunning swath through the midst of the Summer Triangle.
 

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✨Astro Photo of the Day✨
Meet M45! Also known as Pleiades, or Seven Sisters 🌌
One of the brightest and most easily recognized star clusters in the night sky, Pleiades sits just 444 light-years away and contains over 1000 confirmed stars. Those stunning blue wisps you see wrapping around the stars? That’s a reflection nebula; the cluster passing through a cosmic dust cloud, scattering blue light from its bright young stars.

⭐️ Fun Fact: The Pleiades appear in ancient Chinese astronomical texts dating back to 2357 BC. For agricultural tribes in the northern hemisphere, the course of the Pleiades marked the beginning and ending of growing seasons. This brilliant star cluster as we know it, was used as one of humanity’s oldest celestial calendars!

This breathtaking image was captured by William Brown. 📸

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