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Ephemeris: 05/03/2024 – GTAS meeting tonight: Eclipse Tales

May 3, 2024 Comments off

This is Ephemeris for Friday, May 3rd. Today the Sun will be up for 14 hours and 21 minutes, setting at 8:50, and it will rise tomorrow at 6:27. The Moon, 2 days past last quarter, will rise at 4:48 tomorrow morning.

The Grand Traverse Astronomical Society will meet this evening at 8:00 PM at the NMC’s Joseph Rogers observatory which is on Birmley Road, south of Traverse City. The program will consist of returning members from the total solar eclipse last month showing their photographs, and recounting their adventures of going down to the path of totality. And in my case a video of the changes in the sky at totality, as the Moon’s shadow passed over us. Afterward, if it’s clear, will be viewing the skies, though there will be no planets or the Moon out. In the morning hours before dawn tomorrow and Sunday morning there will be a meteor shower, the Eta Aquariid meteor shower of particles from Halley’s Comet striking the Earth’s atmosphere.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). They may be different for your location.

Addendum

Totality is weird. The Sun is still overexposed with its corona. The light bar running through it is simply in the camera. The light pole lamp that the camera is parked under is lit. Since we’re looking up the eclipse path, the trailing edge of the Moon’s shadow is now visible approaching with its twilight colors at the edge.

There will be more photos and stories at the meeting.

Ephemeris: 04/12/2024 – GTAS Meeting tonight: Hidden Figures

April 12, 2024 Comments off

This is Ephemeris for Friday, April 12th. Today the Sun will be up for 13 hours and 22 minutes, setting at 8:24, and it will rise tomorrow at 7:01. The Moon, 3 days before first quarter, will set at 1:52 tomorrow morning.

Tonight’s meeting of the Grand Traverse Astronomical Society at 8 pm, at Northwestern Michigan College’s Rogers Observatory, will feature the student astronomy group’s movie night with a presentation of Hidden Figures. How female African American “Computers”, made the space program possible. Many of NASA’s facilities were in the segregated South. Back then computers were also people with tremendous math skills, who could work out problems of orbital mechanics by hand and with mechanical calculators. Plus we’ll see if anyone has made it back to report on Monday’s total solar eclipse. The observatory is located south of Traverse City on Birmley Road between Garfield and Keystone roads.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). They may be different for your location.

Addendum

Hidden Figures Promo photo
Hidden Figures Promo photo
Hidden Figures actresses with the real persons they portrayed
Hidden Figures actresses with the real women they portrayed. Credit: SEDS-UOC, Sri Lanka

Ephemeris: 03/01/2024 – Mr. Eclipse to give a presentation about April’s Total Solar Eclipse

March 1, 2024 Comments off

This is Ephemeris for Friday, March 1st. Today the Sun will be up for 11 hours and 11 minutes, setting at 6:31, and it will rise tomorrow at 7:17. The Moon, 2 days before last quarter, will rise at 1:09 tomorrow morning.

Tonight’s meeting of the Grand Traverse Astronomical Society will start at a special time, 7 pm, at Northwestern Michigan College’s Rogers Observatory, because we will join the Kalamazoo Astronomical Society via Zoom for a talk by Fred Espenak formerly of NASA. He is known as Mr. Eclipse and of course he will be talking about the April 8th total solar eclipse. Fred Espenak has been responsible for NASA’s eclipse website through the 2017 total solar eclipse. He’s chased the shadow of the Moon around the world. Now retired, he hosts two websites. One of which is mreclipse.com. The observatory is located south of Traverse City on Birmley Road between Garfield and Keystone roads.

You may also join the Kalamazoo Astronomical Society meeting directly: Follow this link to register for Zoom. They have room for 500 people on Zoom, and they’d like to max that out!

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT –5 hours). They may be different for your location.

Addendum

The diamond ring effect
The diamond ring effect at the end of totality with just a bit of the sun’s photosphere peeking around the edge of the moon. This photograph was taken by me during the July 10th 1972 total solar eclipse seen from Prince Edward Island.
The path of the April 8th 2024 total solar eclipse across the US.
The path of the April 8th 2024 total solar eclipse which will pass from southwest to northeast across the United States from Texas to Maine. Click or tap on the image to enlarge it. This image is part of an interactive eclipse map at https://eclipse2024.org/eclipse_cities/statemap.html. Credit: Eclipse2024.org.

Ephemeris: 12/01/2023 – I’ll be exploring ancient Greek astronomy tonight

December 1, 2023 Comments off

This is Ephemeris for Friday, December 1st. Today the Sun will be up for 9 hours and 4 minutes, setting at 5:03, and it will rise tomorrow at 8:00. The Moon, halfway from full to last quarter, will rise at 8:51 this evening.

Tonight at this month’s meeting of the Grand Traverse Astronomical Society which will be at 8 pm at Northwestern Michigan College’s Rogers Observatory. I will be giving an illustrated talk about The Astronomy of the Ancient Greeks. The Greek astronomical view of the universe held sway in the western world sixteen hundred years into the Christian era. I’ll look at the early Greek astronomers from Thales, the first astronomer and philosopher in the 6th century BCE to Ptolemy in the 2nd century CE. Afterward if it’s clear we’ll have a star party starting about 9 pm. The meeting will also be available via Zoom, which I’ll be using to give the talk. Go to gtastro.org for instructions and a link.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT –5 hours). They may be different for your location.

Addendum

Ancient Greek Astronomy title slide.
Ancient Greek Astronomy title slide.

Ephemeris: 11/03/2023 – GTAS meeting tonight

November 3, 2023 Comments off

This is Bob Moler with Ephemeris for Friday, November 3rd. The Sun will rise at 8:23. It’ll be up for 10 hours and 5 minutes, setting at 6:28. The Moon, 2 days before last quarter, will rise at 11:00 this evening.

A documentary on the astronomical life of Jack Newton will be shown tonight at 8 pm at the meeting of the Grand Traverse Astronomical Society at Northwestern Michigan College’s Rogers Observatory, and on Zoom. Jack Newton is a rather famous Canadian amateur astronomer and a pioneer in astrophotography starting in the days before digital photography. After the meeting, at 9 pm, if it’s clear the society will host a star party to view the dark autumn skies including Saturn. The observatory is located south of Traverse City on Birmley Road between Garfield and Keystone roads. Zoom instructions will be at gtastro.org. On Sunday we get to fall back an hour, and get an extra hour of sleep as we go back an hour to standard time.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT –4 hours). They may be different for your location.

Ephemeris Extra: Star Party Tomorrow night, 10/21/2023, if it’s clear

October 20, 2023 Comments off

Update: 10/21/2023 The Star Party has been canceled due to weather (clouds)

This was the last planned star party at the Sleeping Bear Dunes this year. Look for star parties in 2024. Also, there will be a star party after the Grand Traverse Astronomical Society meetings, November 3rd and December 1st, of course weather permitting, at Northwestern Michigan College’s Joseph H. Rogers Observatory. The observatory is located south of Traverse City on Birmley Road. Meetings start at 8 pm, and are not weather dependent, with observing after (approximately 9 pm) if it’s clear. Topic of the meeting programs: November: A documentary video Jack Newton’s Journey to the Stars. Jack Newton (1942-) is a Canadian amateur astronomer and pioneering astrophotographer. December: Ancient Greek astronomy.

Original Post Below

Sleeping Bear Dunes 40th anniversary cake lighting
Sleeping Bear Dunes 40th anniversary cake lighting on at the Stop 3, Pierce Stocking Scenic Drive (Dunes Overlook) October 21, 2010. This was the GTAS second star party with the park in the society’s over 13 year collaboration with the Sleeping Bear Dunes National Lakeshore. I don’t know if there will be a cake this time, but all those candles are not conducive to keeping one’s night vision. We since had to move the star parties to the Dive Climb to accommodate the larger crowds that have built up since. Credit: Eileen Carlisle.

Members of the Grand Traverse Astronomical Society will team up with the park rangers of the Sleeping Bear Dunes National Lakeshore for the last star party of the year celebrating the park’s 53rd anniversary. It will take place at the Dune Climb. Of course, it will only occur if it is clear or partly cloudy. It starts at 4 pm with solar observing using personal and the society’s solar telescopes. Starting at 7 pm it will be dark enough to view the first quarter Moon, followed a bit later with Saturn, and still later with Jupiter. The brighter wonders beyond the solar system will be also be visible later.

Ephemeris extra: 09/22/2023 5 pm – The talk and Star party tonight and tomorrow have been canceled.

September 22, 2023 Comments off

The problem is a communication problem on my end. Sorry.

Ephemeris: 09/22/2023 – Star party tonight in Thompsonville

September 22, 2023 Comments off

This is Ephemeris for Friday, September 22nd. Today the Sun will be up for 12 hours and 10 minutes, setting at 7:40, and it will rise tomorrow at 7:30. The Moon, at first quarter today, will set at 11:45 this evening. | Tonight, if it’s clear, members of the Grand Traverse Astronomical Society will hold a twilight talk and a star party at the Betsie Valley District Library in Thompsonville, MI. It starts at 7 p.m. with a talk about the upcoming solar eclipses by member Dan Dall’Olmo. There will be a minor partial solar eclipse next month on the 14th, and a much greater partial eclipse April 8th for our area. The total part of the April eclipse can be seen less than a day’s drive away in mid-Indiana and northern Ohio. If tonight is cloudy the star party will be postponed to tomorrow. Featured will be the Moon and some of the stars of the waning nights of summer. (It’s looking like Saturday night might be the better night, but we’ll see. A decision can be made as late as 5 pm the day of the event) The season of fall starts tomorrow at 2:50 am with the autumnal equinox.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT –4 hours). They may be different for your location. I’ll have more on the autumnal equinox and its effects on Monday.

The Moon on both possible nights of the Betsie Valley District Library in Thompsonville, MI Eclipse talk and Star Party. Created using Stellarium, GIMP and LibreOffice Draw.
Sunrise on the autumnal equinox
That is not a pumpkin on the head of the motorcyclist. That’s the Sun rising as I’m traveling east on South Airport Road south of Traverse City, MI on the autumnal equinox. This is the east-west section of the road. The Sun is rising over the hills some 6 miles to the east. When the Sun is on the celestial equator, it rises due east and sets due west. Credit: Bob Moler.

Ephemeris: 09/21/2023 – Star party in Thompsonville, MI tomorrow or Saturday

September 21, 2023 Comments off

Sorry for the delay, but we had a star party event as part of a Child & Family Services of Northwestern Michigan event last evening and I forgot this post. The radio program were broadcast at its scheduled times. Any late additions are in italics.

This is Ephemeris for Thursday, September 21st. Today the Sun will be up for 12 hours and 13 minutes, setting at 7:42, and it will rise tomorrow at 7:29. The Moon, 1 day before first quarter, will set at 10:51 this evening.

Tomorrow night, if it’s clear, members of the Grand Traverse Astronomical Society will hold a twilight talk and a star party at the Betsie Valley District Library in Thompsonville, Michigan. It starts at 7 p.m. with a talk about the upcoming solar eclipses by member Dan Dall’Olmo. There will be a minor partial solar eclipse next month on the 14th, and a much greater partial eclipse April 8th. The total part of the April eclipse can be seen less than a day’s drive away in Indiana and Ohio. Featured will be the first quarter Moon and some of the stars of the waning nights of summer. If Friday night is cloudy the event will be postponed until Saturday night. (It’s looking like Saturday night might be the better night, but a decision can be made as late as 5 pm the day of the event) The season of fall starts Saturday with the autumnal equinox.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT –4 hours). They may be different for your location.

Addendum

The Moon on both possible nights of the Betsie Valley District Library in Thompsonville, MI Eclipse talk and Star Party. Created using Stellarium, GIMP and LibreOffice Draw.

Ephemeris: 09/15/2023 – Rare Friday star party at the Sleeping Bear Dunes

September 15, 2023 Comments off

This is Ephemeris for Friday, September 15th. Today the Sun will be up for 12 hours and 32 minutes, setting at 7:53, and it will rise tomorrow at 7:22. The Moon, 1 day past new, will set at 8:20 this evening.

Weather permitting, a sun and star party will be held tonight at the Sleeping Bear Dunes National Lakeshore at the Dune Climb. The solar part will start at 5 pm, while the evening viewing will start around 8:30 pm. These events will be hosted by the park rangers and the Grand Traverse Astronomical Society, who will bring their telescopes to view the heavens, including the planet Saturn and the wonders of the summer Milky Way. The telescopes will be setup in the parking area closest to the dune. As twilight fades Saturn will be about the only object to view, as it gets darker more and more wonders of the Milky Way will be seen. They include star clusters and nebulae, clouds of gas and dust. And maybe we’ll get a peek at the galaxy next door, the Great Andromeda Galaxy.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT –4 hours). They may be different for your location.

Preparing to start the star party
Preparing to begin a star party at the Dune Climb. Credit: Eileen Carlisle.
The Milky Way from Cygnus to Scutum
The Milky Way from Cygnus to Scutum. This image, actually a stack of 5 images. To the naked eye all the faint stars merge their light into the familiar milky glow. Featured here is the Great Rift, a series of dust clouds that split the Milky Way into two sections. Credit Bob Moler (me).