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 ...

RECENT IMPROVEMENTS IN ASTRONOMICAL INSTRUMENTS.—Acting under the directions of the Secretary of the Navy, Prof. Newcomb last year visited the principal Observatories on the continent of Europe for ...

I’ve been saying that today’s date is meaningless when it comes to doomsdays, which is true. But it does have astronomical significance, and for Northern Hemisphereans it’s a happy one: Today, at ...

Polaris's current declination is 89.34°, meaning it would appear at an altitude of 0.66° when viewed from the equator, considering a flat horizon and ideal viewing conditions. Atmospheric refraction ...