Zodiac Constellations Detail

Aries (Mar 21-Apr 19)
Fire sign, cardinal, ruled by Mars
Taurus (Apr 20-May 20)
Earth sign, fixed, ruled by Venus
Gemini (May 21-Jun 20)
Air sign, mutable, ruled by Mercury
Cancer (Jun 21-Jul 22)
Water sign, cardinal, ruled by Moon
Leo (Jul 23-Aug 22)
Fire sign, fixed, ruled by Sun
Virgo (Aug 23-Sep 22)
Earth sign, mutable, ruled by Mercury
Libra (Sep 23-Oct 22)
Air sign, cardinal, ruled by Venus
Scorpio (Oct 23-Nov 21)
Water sign, fixed, ruled by Pluto/Mars
Sagittarius (Nov 22-Dec 21)
Fire sign, mutable, ruled by Jupiter
Capricorn (Dec 22-Jan 19)
Earth sign, cardinal, ruled by Saturn
Aquarius (Jan 20-Feb 18)
Air sign, fixed, ruled by Uranus/Saturn
Pisces (Feb 19-Mar 20)
Water sign, mutable, ruled by Neptune/Jupiter
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About Zodiac Detail

What this tool does

Astronomy tools calculate telescope magnification, orbital periods, escape velocity, habitable zone boundaries, light travel times, parsec-to-light-year conversions, star trail lengths, and satellite visibility windows.

Why use this tool

Amateur astronomers and students need quick reference calculations when planning observations or solving physics problems. Knowing the magnification of an eyepiece-telescope combination, or the escape velocity of a planet, informs both practical stargazing and academic work.

How it works

Magnification divides the telescope's focal length by the eyepiece's focal length. Orbital period uses Kepler's third law. Escape velocity applies the formula v = sqrt(2GM/r). Habitable zone boundaries are estimated from stellar luminosity.

Pro tip

For visual observing, do not exceed 50x magnification per inch of aperture. Higher magnification dims the image and amplifies atmospheric turbulence, making objects harder to see, not easier.

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