POLLUX (Beta Geminorum). At that time, it will sit just 221,771 miles (356,905 kilometers) away. Alnitak is the 5th brightest star in Orion and the 31st brightest star in the sky. For some decades, the most important distance measurement for Deneb is that from ESA’s Earth-orbiting Hipparcos satellite, which operated from 1989 to 1993. DISTANCE FROM EARTH It impossible to know the exact distance, because the individual stars in a constellation are great distance from the Earth.

Pollux is a K0IIIb class orange star, an orange giant. The giant star is about 35 light-years from Earth. The stars in constellations are not really grouped to together, but are some times light years away from each other Pollex is the brighter of the twins. Rigel, of nearly the same absolute magnitude, but closer, stands even higher in the list. is the number of times that the star is from the Earth compared to the Sun. It's the nearest Cepheid variable to Earth, so knowing its distance is a big deal. It shares the 31s place with Alioth, the brightest star in Ursa Major. Pollux is 6.7 degrees north of the ecliptic, too far north to be occulted by the moon and planets, but in the distant future it will be close enough.

Star with planet.In northern spring evenings, the "twin" stars Castor and Pollux of the constellation Gemini descend the northwestern sky looking like a pair of eyes staring down at the Earth. The number of A.U. Hipparcos was the predecessor to Gaia. Pollux (or Beta Geminorum) is a star with an associated star system, located in the Beta Quadrant, in Federation space. At an apparent visual magnitude of 1.14, Pollux is the brightest star in its constellation, even brighter than its neighbor Castor (α Geminorum). They are twins only in mythology, these warriors, Pollux fathered by Zeus and divine, Castor mortal, both placed in the sky to allow them to be together for all time. Alnitak, Zeta Orionis (ζ Ori), is a triple star system with a combined apparent magnitude of 1.77. The star's Galacto-Centric Distance is 7,432.00 Parsecs or 24,240.46 Light Years. It is also relatively close to the planet, at an estimated distance of 51 light-years from Earth . However, modern models for the range of the habitable zone take into account more subtle effects, such as the effect of the carbonate-silicate cycle in regulating carbon dioxide in a planet's atmosphere. Tuesday, April 7 The Moon reaches perigee, its closest point to Earth, at 2:09 P.M. EDT. The size of the habitable zone clearly depends on the luminosity of the star, which determines the equilibrium temperature of the planet.

Obviously, Deneb is intrinsically very bright to make this list from its greater distance. At magnitude 1.58, Castor is the 20th brightest star in Earth's night sky. And now you see why Polaris is so important. Pollux is around 33 light-years from Earth, where it is visible as part of the constellation of Gemini. It can see lots of Cepheids in nearby galaxies, as well as other kinds of stars and objects (like exploding stars) used to measure the distance to more far-flung galaxies. An Astronomical Unit is the distance between Earth and the Sun. (ST reference: Star Charts) The absolute magnitude is the magnitude the stars would have if viewed from a distance of 10 parsecs or some 32.6 light years. It lies at an approximate distance of 1,260 light years from Earth in the constellation Orion. The distance of the Moon varies during the month between 363,104 and 405,696 km, it is a function of the eccentricity of the lunar orbit and hence its apparent size as seen from Earth also varies.