Astronomer’s Guild

Astronomer’s Guild Astronomy and astrophotography club in SD&G to learn and share how to explore, capture and love the night sky.

🌌 FACT CHECK: That "Blue Moon & Planet Alignment" photo is fake!If you've seen the viral graphic showing a massive moon ...
05/30/2026

🌌 FACT CHECK: That "Blue Moon & Planet Alignment" photo is fake!

If you've seen the viral graphic showing a massive moon stacked tightly with Saturn, Jupiter, and Mars… it’s obviously photoshopped!!

While the astronomy is real, the photo is impossible. The planets and the moon will actually be on completely opposite sides of the sky!

❌ The Myth vs. ✅ The Reality

🚫MYTH: The planets are huddled right next to the moon in a tight, vertical stack.
🔭REALITY: They are actually on completely opposite sides of the sky! When the moon rises in one direction, the evening planets are setting in the exact opposite direction. You cannot see them all crowded together like they are in the photo.

🚫MYTH: The moon will look bright blue.
🔭REALITY: It's called a "Blue Moon" because it’s the second full moon in a single calendar month (the first was May 1st). It will actually look beautifully golden-orange when it first rises due to our atmosphere.

Here is how to actually see it this weekend (May 30–31) right here in Cornwall:

👋 The Evening Show (8:40 PM – 9:15 PM)
Looking West-Northwest (Sunset): You’ll spot a brilliant Venus and Jupiter hanging low together.

Looking Southeast: Turn 180° around at the exact same time to watch the Blue Moon rise. It won't look blue, but it will be a stunning golden-orange!

📍 Cornwall Tip: Head down to Lamoureux Park or along the St. Lawrence River for the best unobstructed view of both horizons.

☕ The Morning Crew (Pre-Dawn Sunday)
Looking East: If you're up early before sunrise, look east to catch Saturn and a reddish Mars trailing behind it.

Don't let the edits fool you… the real sky looks much better anyway! 🌕✨🔭

“Once in a Blue Moon” finally happens tomorrow night — during a planet lineup.

On May 30-31, the moon will officially become full for the second time in a single calendar month, creating what’s commonly known as a Blue Moon.
At the same time, skywatchers will also be able to spot a rare lineup of planets stretching across the evening and early morning sky.

Mercury, Jupiter, Venus, Saturn, and Mars will all be visible within hours of each other, though not all at once. Some will appear after sunset, while others rise closer to dawn.

The combination is turning this weekend into one of the most unusual skywatching events of the year.

The phrase “once in a blue moon” became famous because events like this are genuinely rare.

A Blue Moon happens because the moon’s 29.5-day cycle doesn’t perfectly match our calendar system. Occasionally, that timing allows two full moons to occur in the same month.

That’s exactly what happened in May 2026.

The first full moon — known as the Flower Moon — rose on May 1. Now, another full moon is arriving just before the month ends.

Despite the name, the moon itself probably won’t appear blue.

Instead, it will likely glow orange near the horizon during moonrise tomorrow evening. That color comes from Rayleigh scattering, the same atmospheric effect that makes sunsets appear red and orange.

As moonlight passes through a thicker layer of Earth’s atmosphere, shorter blue wavelengths scatter away while longer red and orange wavelengths continue toward your eyes.

The best time to see the Blue Moon will be shortly after sunset on Saturday evening. Find a clear southeastern horizon and watch for a large golden-orange moon rising into the dusk sky.

The next monthly Blue Moon won’t happen again until Dec. 31, 2028.

We happily support the Cornwall Public Library’s Artemis II presentation tomorrow evening at 6:30pm!! 🔭🚀🌕Some of our mem...
05/27/2026

We happily support the Cornwall Public Library’s Artemis II presentation tomorrow evening at 6:30pm!! 🔭🚀🌕

Some of our members will be in attendance, if you have any questions for us!!

"We do not leave Earth, but we choose it."

The Artemis II crew didn't just break records, they gave us a new perspective on our home planet.

Join us for the NASA Artemis Program discussion on May 27 @ 6:30 p.m.

📷: nasa.gov

The SDG Astronomy and Astrophotography Guild is excited to help promote this upcoming guest speaker event at the Cornwal...
05/13/2026

The SDG Astronomy and Astrophotography Guild is excited to help promote this upcoming guest speaker event at the Cornwall Public Library!

Join Solar System Ambassador Elaine Fortin as she returns to discuss NASA’s mission to return humans to the lunar surface.

• When: Wednesday, May 27, 2026 @ 6:30 p.m.
• Where: Cornwall Public Library
• Topic: The Artemis Program—from the success of Artemis I to the goal of reaching Mars.

Discover how space exploration has shifted from the Apollo era to today’s international partnerships and commercial innovation. Whether you're an experienced member of the Guild or a curious newcomer, we hope to see you there!

Wednesday, May 27, 2026 @ 6:30 p.m. | NASA Artemis Program

Solar System Ambassador Elaine Fortin returns to the Cornwall Public Library to discuss the NASA Artemis Program, and its focus on reviving human exploration of the moon as a step to reaching Mars.

The program began with Artemis I, an unmanned mission, which circled the moon in November 2022, fifty years after Apollo 17, the last manned lunar mission, in 1972, and will take place in multiple phases: The April launch of Artemis II being the second phase, and followed by the March 2027 scheduled launch of Artemis III, which will fly in low earth orbit to test interactivity between Artemis’s ‘Orion’ spacecraft and several commercially produced modules. Artemis IV, scheduled for 2028 will land humans on the moon, and there are many more launches planned after that.

Apollo was all about NASA. Today, many new partners are involved. Besides major space agencies from other countries, today’s world has seen a shift in players who can afford to build and explore space.

Lots to discuss, and it starts with Artemis! We hope you will join us!

📷: nasa.gov

💫💫Lyrids Meteor Shower: Fact vs. Fiction in Cornwall!💫💫You’ve probably seen this photo floating around today, but don't ...
04/21/2026

💫💫Lyrids Meteor Shower: Fact vs. Fiction in Cornwall!💫💫

You’ve probably seen this photo floating around today, but don't let the "Astro-bait" fool you! While the Lyrid Meteor Shower is definitely happening, it won't look quite like this AI masterpiece.

Here is what you actually need to know if you're heading out in Cornwall tonight or tomorrow:

❌ THE PHOTO IS FAKE: Those parallel streaks and jagged mountains? Definitely not Cornwall. (Shocker 😲) Real meteors "radiate" from one spot (the constellation Lyra) and you’ll see about 15–20 per hour, not 100 at once!

✅ WHEN TO WATCH: The peak is Tuesday night (April 21) into Wednesday morning (April 22). The best viewing is after midnight once the moon sets.

✅ WHERE TO GO: Get away from the lights of Brookdale and Pitt St! Drive 15 mins North toward St. Andrews or East toward Lancaster. Dark skies are your best friend.

☁️ LOCAL WEATHER: Keep an eye on the sky! While it's clear now, Tuesday night is looking cloudy (of course it is, story of our lives 🤦‍♀️) with a low of -1°C. Bundle up if you're heading out!

🧠Pro Tips:🧠
1. Ditch the phone: It takes 20 mins for your eyes to adjust to the dark. One text message ruins your "night vision."

2. Look Northeast: Look toward the bright star Vega, but let your eyes wander—the best "tails" often appear further away from the center.
Happy stargazing, Cornwall! 🌌🔭

Our thoughts are with the NASA Artemis crew today. Rentry is the most dangerous part of the mission! 🚀                  ...
04/10/2026

Our thoughts are with the NASA Artemis crew today. Rentry is the most dangerous part of the mission! 🚀

There is a multitude of AI generated photos being posted of the moon and Artimis’ journey. Please stay vigilant and stop...
04/07/2026

There is a multitude of AI generated photos being posted of the moon and Artimis’ journey. Please stay vigilant and stop the spread of misinformation.

We will only be sharing our information straight from the NASA - National Aeronautics and Space Administration source, to ensure it’s legit.

It’s an amazing time to be alive. Our thoughts are with the Artemis crew… enjoy every moment up there 🌕 and safe journey home 🌎

Make new friends, but keep the old.

This new photo from the Artemis II crew features a combined view of the Moon’s near and far sides.

🌓 The near side, visible on the right, is identifiable by the dark splotches that cover its surface, created early in the Moon’s history when it was volcanically active. This is the side of the Moon we can see from Earth.

The large crater west of the lava flows is Orientale basin, a nearly 600-mile-wide crater that straddles the Moon’s near and far sides. The Artemis II crew are the first people to ever see the full Orientale Basin.

🌗 Everything to the left of the crater is the far side, the hemisphere we don’t get to see from Earth because the Moon rotates on its axis at the same rate that it orbits round us.

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