The historic building atop Mt. Hamilton is red-tagged and closed to visitors. But Astronomer Elinor Gates gave us a ...

On January 18, 2002, the National Science Foundation formally opened the Gemini South telescope in Chile. This became the ...

NASA announced the selection of industry proposals to advance technologies for the agency’s Habitable Worlds Observatory concept.

The National Weather Service expects a storm to hit Mount Hamilton on Friday night and bring 2 to 2 1/2 inches of rain to the mountaintop by Tuesday morning, most of it falling by Sunday afternoon.

Mock observations test the performance of the Chinese Space Station Telescope as the 2-meter-class observatory moves closer ...

A billionaire-backed philanthropic organization is funding the development of a series of new observatories, including a ...

Former Google CEO Eric Schmidt and his wife, Wendy, recently announced that they would finance, out of their own pocket, a ...

Eric and Wendy Schmidt are backing a start-up-like approach to building a giant space telescope and powerful ground ...

I have been writing about the Giant Magellan Telescope for a long time. Nearly two decades ago, for example, I wrote that ...

Gamma-ray bursts (GRBs) are among the most powerful explosions in the universe, second only to the Big Bang. The majority of these bursts are observed to flash and fade within a few seconds to minutes ...

Commercial satellites in orbit, which are largely owned by Elon Musk's SpaceX, are blocking images of the cosmos taken from both the ground and in space. A study released by Nature earlier this month ...

There are plenty of parades we can easily join in this world — the zany Doo Dah Parade in Pasadena welcomes anyone for a $10 fee — but there are a few noble processions that we must be satisfied from ...