The Custer Institute and Observatory Archives

04.12.2025 Featured Story

Spring Sky Watch: Newly discovered comet on the horizon

A new interstellar visitor was discovered in late March, a previously unknown comet designated C/2025 F2 (SWAN). An amateur astronomer in Australia, Michael Mattiazzo, discovered the comet by studying...

08.10.2024 Featured Story

Spectacular meteor show peaking soon in Shelter Island skies

Get ready to stay up late and stare at the sky. The annual Perseid meteor shower runs from July to September, but this year the celestial display peaks on...

03.06.2024 Featured Story

Comet, Orion and solar eclipse: Can’t-miss celestial wonders on tap

A host of exciting celestial events for skywatchers starts with a comet at the beginning of March, the change of the constellation guard as the seasons shift and ending...

02.02.2023 Featured Story

Tracking the green comet in our skies

The Custer Institute and Observatory — Long Island’s oldest public observatory — in Southold, will give stargazers the chance to see an ultra-rare green comet at its regular Saturday...

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Spring Sky Watch: Newly discovered comet on the horizon

Spectacular meteor show peaking soon in Shelter Island skies

Comet, Orion and solar eclipse: Can’t-miss celestial wonders on tap

Tracking the green comet in our skies