Category Archives: Sidereal Times

The Unchecked Growth of Orbital Debris

Posted on January 3, 2026 by ST Editors

by Abhinav Sukla I don’t think it would be wrong to label the current era as the early dawn of the space age. Hardly half a century has passed since the first rockets left our atmosphere. Even in the early … Continue reading →

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Impact of Relativity on the Hubble Equation

Posted on January 3, 2026 by ST Editors

by William H. Davis The Hubble equation  v=Ho/dv= H_o/d is commonly used to estimate distances to distant objects emitting light. The observations by a number of astronomers, even before Hubble, recognized a relationship between velocity and distance of nearby objects. … Continue reading →

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Snippets

Posted on January 3, 2026 by ST Editors

compiled by Arlene & David Kaplan Did Astronomers See a Star Explode Twice? Astronomers may have spotted their first superkilonova — a star that’s exploded not once, but twice. When massive stars die, they detonate in a celestial fireworks display known as … Continue reading →

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From The Director

Posted on December 2, 2025 by ST Editors

by Rex Parker, PhD director@princetonastronomy.org December 9, 2025 Meeting at Peyton Hall.  December’s winds whirl over the ivy-covered gothic spires and gleaming contemporary towers on the Princeton University campus, where we’ll meet for our final session of the calendar year … Continue reading →

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From The Program Chair

Posted on December 2, 2025 by ST Editors

by Victor Davis, Program Chair The Universe in a ComputerThe December, 2025 meeting of the AAAP will take place in Peyton Hall on the campus of Princeton University on Tuesday, December 9th at 7:30 PM. As usual, the meeting is … Continue reading →

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Observatory Report

Posted on December 2, 2025 by ST Editors

by Dave and Jennifer Skitt, Observatory Co-Chairs Solar Observing on November 29, 2025 Upon hearing of the Grand Re-Opening of the Nature Center in Washington Crossing State Park on Thanksgiving weekend, I wondered what AAAP could do to entice park … Continue reading →

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