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, ...

Today, I want to talk about the equatorial coordinate system. Start with this: What if we could project Earth's coordinates of longitude and latitude into the sky? Latitude wouldn't be a problem, but ...

Today is the winter solstice – specifically, it occurs at 23:38 GMT, or 6:38 p.m. Eastern (US) time. Technically what this means is that, at that moment, the center of the Sun is at the lowest ...

The Geographical Journal has been published since 1831, and was the Society's journal of report until the relaunch in 2000. It has the highest circulation of any British academic journal in its field ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Look up the next few evenings! Venus and Saturn will appear near each other in the night sky this ...

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 ...