This week presents an exciting array of astronomical phenomena, including the last quarter moon and several planetary alignments. In this article, we’ll explore key celestial events involving the ...

We once used to embrace a 13-month calendar, and some cultures still follow this format. So why are they 12 months instead of 13?

Did you know both the astronomical first day of spring and Easter Sunday are tied to the spring equinox? How they relate, what to know for spring 2025.

Thursday is the first day of astronomical spring. Here's what Texas can expect after an unusually cold and snowy winter.

While meteorological spring has been around for a few weeks, Thursday marks the start of astronomical spring. That means the ...

Astronomical spring: The Earth’s orbit forms the basis for the astronomical calendar in which seasons are defined by two solstices and two equinoxes. The Earth is tilted 23.5 degrees on its axis ...

Astronomical spring: The Earth’s orbit forms the basis for the astronomical calendar in which seasons are defined by two solstices and two equinoxes. The Earth is tilted 23.5 degrees on its axis ...

The northern lights were visible on the Peninsula on May 10, 2024, and could make a reappearance locally in 2025. Photo by Eleanor Raab. Last year brought a number of celestial spectacles to Bay ...

“The Earth’s annual trip around the sun forms the basis for the astronomical calendar in which seasons are defined by two solstices and two equinoxes.” There are two equinoxes and two ...

Meteorological spring starts on March 1 and is based on annual temperature cycles, while astronomical spring starts on March 20 and is based on the Earth's position relative to the sun.