SKU: 17232443786

The Year-Round Messier Marathon

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The Year-Round Messier MarathonBy Harvard Pennington Product Information: 8. 50" by 11. 00", 194 pages, hardbound. Among the deepest satisfactions of amateur astronomy is knowing your way around the sky. From the familiar guideposts of the brightest stars, you confidently point your binoculars or telescope toward the Andromeda galaxy, the Hercules cluster, or the Lagoon nebula. This book was written for the person who wants to become deeply familiar with the most famous list of 110

By Harvard Pennington

Product Information: 8.50" by 11.00", 194 pages, hardbound.

Among the deepest satisfactions of amateur astronomy is knowing your way around the sky. From the familiar guideposts of the brightest stars, you confidently point your binoculars or telescope toward the Andromeda galaxy, the Hercules cluster, or the Lagoon nebula. This book was written for the person who wants to become deeply familiar with the most famous list of 110 deep-sky wonders, the Messier objects. Using bright “guidepost stars”and detailed sky charts, the novice soon learns how to find the nebulae, star clusters, and galaxies that every amateur astronomer should know. And you need not “run” this marathon just a few weeks a year. Even at the worst you will have about 90 of the 110 objects visible throughout the year!

The observing techniques taught in this book are both easy to learn and powerful, suitable not only for the novice but also for the experienced amateur. By following the sequence of charts presented in the second half of the book, a beginner using Harvard Pennington's methods should be able to locate and identify 25 to 30 Messier objects at any time of year before midnight. By working systematically against time, by running the “Messier Marathon” the observer quickly hones crucial observing skills and soon gains a deep familiarity with the night sky.

Once each year, on a moonless night during late March or early April, observers have an opportunity to test their skills by trying to observe all 110 objects that make up the Messier catalog in just one night! In the early evening, its a race against time to sight the first objects before they set. During the night, marathoners maintain a steady pace to find object after object, and as the dawn light grows, they try to spot the last one before it is lost in the morning twilight. It is not easy, but those who have done the dusk-to-dawn Messier Marathon run it again and again.

In this book, Harvard Pennington shows how to:

  • Learn 17 bright finder stars and 17 prominent finder constellations so you will know where to look for all 110 Messier objects.
  • Align a sighting device such as the Telrad® so that you can point your telescope rapidly and with assurance toward all of the Messier objects
  • Calibrate your telescope so that you know exactly how much sky you see through your finder and through the eyepiece of your telescope.
  • Find all of the Messier objects using the maps, drawings and descriptions included in this book. You will know exactly where to point your telescope, and what the object should look like when you find it.
  • The Year-Round Messier Marathon Field Guide is designed around pages like those shown above which take the guess work out of locating Messier Objects. The circles shown on the map of Orion are Telrad finder views. Just place the Telrad as shown and you are very close. Then check (if necessary) the 8 x 50 finder views shown on the opposite page to zero in on the object. The sketches and accompanying text take the guess work out any final identification. This technique works year-round so you do not have to limit your fun to a single night in the Spring!

ISBN: 978-0943396545

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SKU: 17232443786

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Dan
Lowell, US
★★★★★ 5
Lots of extras!
Size: 2+12+12+2 pack
The brushes are a bit flimsier than the original but otherwise fine. I needed it for the rectangular filters more than anything
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Reviewed in the United States on March 7, 2026
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Pan8ita
Belleville, US
★★★★★ 5
EUFY 11S
Size: 2+8 pack
Used to replace the ones for my EUFY 11S vacuum. They fit just like the ones and got my vacuum back to cleaning really good. Didn’t realize how loud my vacuum had become until I replaced these parts.
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Reviewed in the United States on December 19, 2025
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Armeeda
Los Angeles, US
★★★★★ 5
Get this!
Size: 3+12+12+2+1 pack
Very nice pack of essentials for my robot.
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Reviewed in the United States on March 17, 2026
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Alex
Lake Worth, US
★★★★★ 5
Side brush screw PSA 🤪
Size: Eufy B-18Packs
Reviewing parts for Eufy L60 Review posted for some PSA When you get the brush replacement this kit comes with a tiny screw driver DO NOT USE THAT TINY SCREWDRIVER TO UNDO YOUR SIDE BRUSH IT WILL STRIP THE OEM SCREW AND MAKE IT USELESS. the screw driver included fits the screws that are about 2 mil wide the side brush screw is different. Grab a regular screw driver to undo a side brush. The main rolling brush cover is different but the rubber part still hits the floor at proper height so I don’t see a big issue there. When replacing the filter the filter cover was a little snug but I don’t see a big problem there just be aware to close the cover all the way but be careful not to push too hard so the plastic clips don’t break on the cover. Don’t forget to wipe down all the seals when installing the filter to maintain the seal integrity to keep the suction at top intensity. The dust bags seemed to be cut out with a stencil which gave the cardboard a better appearance than the oem cut out dust bags so that was interesting, dimensions were identical when comparing so I don’t anticipate any issues! Over all I’m glad we have cheaper alternative replacement parts that can be used so thank you! ❤️
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Reviewed in the United States on January 30, 2025
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Amazon Customer
Louisville, US
★★★★★ 5
Great parts replacement kit for Eufy!
Size: Eufy B-18Packs, Size: Eufy B-18Packs
This kit has made it nice keeping up with our Eufy robot vacuum. All parts were free of defect and fit as it should. Instead of replacing individual piece by piece, I now just change all of the replacement parts at one time and it’s good to go for a while! Great value. Great quality. Will definitely be buying this kit again!
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Reviewed in the United States on April 7, 2026

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