ptolemy

Do Stars Move? Tracking Their Movements Across the Sky

The stars look static in the sky, but are they moving? How fast, and how do we know? What events…

7 years ago

The Cepheus Constellation

Located in the northern hemisphere is Cepheus, one of the 48 constellations included by Ptolemy in his classic work, The…

7 years ago

The Cassiopeia Constellation

In the northern skies (recognizable from its W shape) is the familiar constellation of Cassiopeia, one of the 48 traditional…

7 years ago

The Canis Minor Constellation

Located in the northern skies, surrounded by the Monoceros, Gemini, Cancer and Hydra, is the constellation known as Canis Minor.

7 years ago

The Constellation Boötes

In the northern skies, flanked by the Big Dipper, lies the Bootes constellation, one of the traditional constellations listed by…

8 years ago

The Constellation Auriga

In the northern skies lies the constellation Auriga, one of the 44 described by Ptolemy and one of the 88…

8 years ago

The Constellation Aries

On the ecliptic plane, bordered by constellations of Perseus, Pisces, and Taurus, is the ancient constellation known as Aries

8 years ago

The Aquarius Constellation

Aquarius ("The Water Carrier") stretches from the celestial equator to the southern hemisphere, and is one of the most-recognized of…

8 years ago

What Is The Geocentric Model Of The Universe?

The geocentric model of the universe, in which the Sun, planets and stars revolved around the Earth, was the accepted…

8 years ago

What Is The Heliocentric Model Of The Universe?

In 1543, Polish astronomer Nicolaus Copernicus revolutionized astronomy by proposing his heliocentric model of the Universe

8 years ago