Get it on Google Play
New! Download Unionpedia on your Android™ device!
Faster access than browser!
And Ads-free!
New! Save your concepts! » Create account

9 Persei is a pulsating variable star in the constellation Perseus. [1]

6 relations: Apparent magnitude, Blue supergiant, Constellation, Hydrogen, Perseus (constellation), Variable star.

The apparent magnitude (m) of a celestial object is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere.

New!!: 9 Persei and Apparent magnitude · See more »

Blue supergiants (BSGs) are hot luminous stars, referred to scientifically as OB supergiants.

New!!: 9 Persei and Blue supergiant · See more »

In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU).

New!!: 9 Persei and Constellation · See more »

Hydrogen is a chemical element with chemical symbol H and atomic number 1.

New!!: 9 Persei and Hydrogen · See more »

Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky.

New!!: 9 Persei and Perseus (constellation) · See more »

A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.

New!!: 9 Persei and Variable star · See more »


[1] https://en.wikipedia.org/wiki/9_Persei

Hey! We are on Facebook now! »