Archaeological sites such as Stonehenge were designed to align with the Sun's position on specific days, primarily solstices. Earth's precession, a 26,000-year cycle, shifts the Earth's axis but does ...

Right ascension, a celestial coordinate dating back to Hipparchus, measures the east-west position of celestial objects along the celestial equator, starting from the vernal equinox. Right ascension, ...

How much of the sky can you see at any one time? This, of course, assumes you are looking up from a wide-open, flat field or out on an ocean liner with nothing but a flat horizon no matter which way ...

Spring is about to, well, spring! At least, in the Earth’s Northern Hemisphere. This year’s official onset of spring occurs Saturday at 10:32 a.m. Astronomers are fond of saying that the first day of ...

As the weather gets warmer and clearer skies return, make plans to stargaze over the next several months. Whether you are staying at home or heading out on vacation, your latitude location will play a ...

After the long winter in Rochester, we definitely need spring in our collective lives. It’s time for spring to begin. And it will on Sunday, at least astronomically, at 6:21 p.m., the exact moment of ...

How much of the sky can you see at any one time? This, of course, assumes you are looking up from a wide-open, flat field or out on an ocean liner with nothing but a flat horizon no matter which way ...