Question

Which sequence of stars is listed in order of

increasing luminosity?
1) Spica, Rigel, Deneb, Betelgeuse
2) Polaris, Deneb, 40 Eridani B, Proxima Centauri
3) Barnards Star, Alpha Centauri, Rigel, Spica
4) Procyon B, Sun, Sirius, Betelgeus

Answer 1

4) Procyon B, Sun, Sirius, Betelgeus

Step-by-step explanation:

A star is a giant astronomical or celestial object that is comprised of a luminous sphere of plasma, binded together by its own gravitational force.

Basically, stars are typically made up of two (2) main hot gas, Hydrogen (H) and Helium (He).

The luminosity of a star refers to the total amount of light radiated by the star per second and it is measured in watts (w).

• Procyon B has a luminosity of 2.105 * 10^23 watts.

• The Sun has a luminosity of 3.827 * 10^26 watts.

• Sirius has a luminosity of 9.721 * 10^27 watts.

• Betelgeus has a luminosity of 5.38 * 10^31 watts.

Hence, the sequence of stars that is correctly listed in order of increasing luminosity is Procyon B, Sun, Sirius and Betelgeus.