The Sun’s Many Strange Neighbors – The Catholic Astronomer

The table at right* shows the distance to and luminosity of the twenty stars closest to our solar system. Distance is measured in light years (meaning that if a star is 10 light years from Earth, then it would require 10 years to reach that star, travelling at the speed of light). Luminosity, or power output, is given in terms of the Sun’s output (so a star with the same power output as our Sun would have a luminosity of 1). The stars in this table are the solar system’s twenty nearest neighbors. Notice what a wimpy lot our neighbors are. Yes, there are some respectable stars among the bunch—obviously Sirius A, with 22 times (22x) the Sun’s power output, is a serious*~ star. Sirius is the “Dog Star” in the constellation Canis Major, and the brightest star in the night sky. It appears bright to us both because it is very close and because it is quite powerful. Procyon, … Continue reading →

Sorgente: The Sun’s Many Strange Neighbors – The Catholic Astronomer

Annunci

Rispondi

Inserisci i tuoi dati qui sotto o clicca su un'icona per effettuare l'accesso:

Logo WordPress.com

Stai commentando usando il tuo account WordPress.com. Chiudi sessione / Modifica )

Foto Twitter

Stai commentando usando il tuo account Twitter. Chiudi sessione / Modifica )

Foto di Facebook

Stai commentando usando il tuo account Facebook. Chiudi sessione / Modifica )

Google+ photo

Stai commentando usando il tuo account Google+. Chiudi sessione / Modifica )

Connessione a %s...