DULUTH — We woke up to winter, and now it's spring. Funny how astronomical events can turn on a dime. The new season began at 10:33 a.m. CDT Sunday when the center of the sun crossed the celestial ...

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, ...

The equatorial coordinate system projects Earth's latitude and longitude onto the celestial sphere, using declination (angular distance from the celestial equator, measured in degrees) and right ...

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 ...

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 ...

When it comes to locating objects in the night sky, how does one convey its precise position? The sky is divided into a scattered pattern of 88 constellations of various sizes and shapes covering ...

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 ...