Table of Contents
What OBAFGKM means?
OBAFGKM is a classification system that’s designed to help astronomers and scientists identify different types of stars. To the naked eye, the stars all appear to be white. Being able to distinguish stars based on their color is important. You see, all of the stars in space are special.
What type of star is OBAFGKM?
Types of Stars
Spectral Type | Color | Examples |
---|---|---|
O | Blue-violet | Stars of Orion’s Belt |
B | Blue-white | Rigel |
A | White | Sirius |
F | Yellow-white | Polaris |
Where is OBAFGKM from?
What do the initials of “OBAFGKM” mean? A: It appears that when stars were first being classified in the 1890s, an astronomer at Harvard named Edward Pickering decided to sort the stars according to how much hydrogen they contained.
Why is the order OBAFGKM?
Stellar spectral types originally followed alphabetical order. This left seven basic stellar types, designated OBAFGKM, which generations of astronomers and science-fiction readers have learned through the mnemonic “Oh, Be A Fine Girl (or Guy), Kiss Me.”
What star class is the sun?
G2V
Sun/Spectral type
What is luminosity of the Sun?
1 L☉
Sun/Luminosity
What luminosity class is the Sun?
To completely describe the star, the MK luminosity class is appended to the original Harvard classification for the star. For example, our Sun is a main sequence G2 star, therefore its full classification is G2V.
Who discovered Obafgkm?
In 1901, another of Pickering’s assistants, Annie Jump Cannon, also began to work on the classification sequence. Her meticulous observations led her to simplify the 22-type scheme into a sequence of *temperature*: OBAFGKM.
Who discovered OBAFGKM?
What is the greatest mass a newborn star can have?
150 times
A newborn star can have the greatest mass of 150 times the solar mass.