3 min read<\/p>\n
Weird Ways to Observe the Moon<\/h1>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n![\"\"](\"https:\/\/assets.science.nasa.gov\/dynamicimage\/assets\/science\/cds\/nightsky\/articles\/FunnelPhotos_896.original.jpg?w=896&h=504&fit=clip&crop=faces%2Cfocalpoint\")
<\/a><\/figure>\nSun Funnels in action! Starting clockwise from the bottom left, a standalone Sun Funnel; attached to a small refractor to observe the transit of Mercury in 2019; attached to a large telescope in preparation for evening lunar observing; projection of the Moon on a funnel from a medium-size scope (5 inches).<\/div>\nNight Sky Network<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\nInternational Observe the Moon Night<\/a>\u00a0is on October 4, 2025, this year\u2013 but you can observe the Moon whenever it\u2019s up, day or night! While binoculars and telescopes certainly reveal incredible details of our neighbor\u2019s surface, bringing out dark seas, bright craters, and numerous odd fissures and cracks, these tools are not the only way to observe details about our Moon. There are more ways to observe the Moon than you might expect, just using common household materials.<\/p>\nPut on a pair of sunglasses<\/strong>, especially polarized sunglasses! You may think this is a joke, but the point of polarized sunglasses is to dramatically reduce glare, and so they allow your eyes to pick out some lunar details! Surprisingly, wearing sunglasses even helps during daytime observations of the Moon.<\/p>\nOne unlikely tool is the humble plastic bottle cap<\/strong>! John Goss from the Roanoke Valley Astronomical Society shared these directions on how to make your own bottle cap lunar viewer, which was suggested to him by Fred Schaaf many years ago as a way to also view the thin crescent of Venus when close to the Sun:<\/p>\n\u201cThe full Moon is very bright, so much that details are overwhelmed by the glare. Here is an easy way to see more! Start by drilling a 1\/16-inch (1.5 mm) diameter hole in a plastic soft drink bottle cap. Make sure it is an unobstructed, round hole. \u00a0Now look through the hole at the bright Moon. The image brightness will be much dimmer than normal \u2013 over 90% dimmer \u2013 reducing or eliminating any lunar glare. The image should also be much sharper because the bottle cap blocks light from entering the outer portion of your pupil, where imperfections of the eye\u2019s curving optical path likely lie.\u201d Many report seeing a startling amount of lunar detail!<\/p>\n
You can project the Moon<\/strong>! Have you heard of a \u201cSun Funnel\u201d? It\u2019s a way to safely view the Sun by projecting the image from an eyepiece to fabric stretched across a funnel mounted on top. It\u2019s easy to make at home, too \u2013 directions are here: bit.ly\/sunfunnel<\/a>. Depending on your equipment, a Sun Funnel can view the Moon as well as the Sun\u2013 a full Moon gives off more than enough light to project from even relatively small telescopes. Large telescopes will project the full Moon and its phases with varying levels of detail; while not as crisp as direct eyepiece viewing, it\u2019s still an impressive sight! You can also mount your smartphone or tablet to your eyepiece for a similar Moon-viewing experience, but the funnel doesn\u2019t need batteries.<\/p>\nOf course, you can join folks in person or online to celebrate our Moon on October 4, 2025, with International Observe the Moon Night \u2013 find details at moon.nasa.gov\/observe.<\/a> <\/p>\nOriginally posted by Dave Prosper: September 2021<\/em><\/p>\nLast Updated by Kat Troche: March 2025<\/em><\/p>\nPowered by WPeMatico<\/a><\/small><\/p>\nGet The Details…<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"International Observe the Moon Night\u00a0is on October 4, 2025, this year\u2013 but you can observe the Moon whenever it\u2019s up, day or night! While binoculars and telescopes certainly reveal incredible details of our neighbor\u2019s surface, bringing out dark seas, bright craters, and numerous odd fissures and cracks, these tools are not the only way to [\u2026] Continue reading
<\/a><\/figure>International Observe the Moon Night<\/a>\u00a0is on October 4, 2025, this year\u2013 but you can observe the Moon whenever it\u2019s up, day or night! While binoculars and telescopes certainly reveal incredible details of our neighbor\u2019s surface, bringing out dark seas, bright craters, and numerous odd fissures and cracks, these tools are not the only way to observe details about our Moon. There are more ways to observe the Moon than you might expect, just using common household materials.<\/p>\n Put on a pair of sunglasses<\/strong>, especially polarized sunglasses! You may think this is a joke, but the point of polarized sunglasses is to dramatically reduce glare, and so they allow your eyes to pick out some lunar details! Surprisingly, wearing sunglasses even helps during daytime observations of the Moon.<\/p>\n One unlikely tool is the humble plastic bottle cap<\/strong>! John Goss from the Roanoke Valley Astronomical Society shared these directions on how to make your own bottle cap lunar viewer, which was suggested to him by Fred Schaaf many years ago as a way to also view the thin crescent of Venus when close to the Sun:<\/p>\n \u201cThe full Moon is very bright, so much that details are overwhelmed by the glare. Here is an easy way to see more! Start by drilling a 1\/16-inch (1.5 mm) diameter hole in a plastic soft drink bottle cap. Make sure it is an unobstructed, round hole. \u00a0Now look through the hole at the bright Moon. The image brightness will be much dimmer than normal \u2013 over 90% dimmer \u2013 reducing or eliminating any lunar glare. The image should also be much sharper because the bottle cap blocks light from entering the outer portion of your pupil, where imperfections of the eye\u2019s curving optical path likely lie.\u201d Many report seeing a startling amount of lunar detail!<\/p>\n You can project the Moon<\/strong>! Have you heard of a \u201cSun Funnel\u201d? It\u2019s a way to safely view the Sun by projecting the image from an eyepiece to fabric stretched across a funnel mounted on top. It\u2019s easy to make at home, too \u2013 directions are here: bit.ly\/sunfunnel<\/a>. Depending on your equipment, a Sun Funnel can view the Moon as well as the Sun\u2013 a full Moon gives off more than enough light to project from even relatively small telescopes. Large telescopes will project the full Moon and its phases with varying levels of detail; while not as crisp as direct eyepiece viewing, it\u2019s still an impressive sight! You can also mount your smartphone or tablet to your eyepiece for a similar Moon-viewing experience, but the funnel doesn\u2019t need batteries.<\/p>\n Of course, you can join folks in person or online to celebrate our Moon on October 4, 2025, with International Observe the Moon Night \u2013 find details at moon.nasa.gov\/observe.<\/a> <\/p>\n Originally posted by Dave Prosper: September 2021<\/em><\/p>\n Last Updated by Kat Troche: March 2025<\/em><\/p>\n Powered by WPeMatico<\/a><\/small><\/p>\n Get The Details…<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" International Observe the Moon Night\u00a0is on October 4, 2025, this year\u2013 but you can observe the Moon whenever it\u2019s up, day or night! While binoculars and telescopes certainly reveal incredible details of our neighbor\u2019s surface, bringing out dark seas, bright craters, and numerous odd fissures and cracks, these tools are not the only way to [\u2026] Continue reading