What does Obafgkm stand for?
Definition. OBAFGKM. Oh, Be A Fine Girl/Guy, Kiss Me (mnemonic for the order of star temperatures)
Why are stars classified as Obafgkm?
Q: What do the initials of “OBAFGKM” mean? A: Description of the spectral types (the labels OBAFGKM are called “spectral types” because the way to measure hydrogen in stars is to look at their spectra, or emission lines).
What are the 7 spectral classes of stars?
Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M.
What is the spectral classification Obafgkm for a spectrum with?
What is O B A F G K M?
| Class | Spectrum | Temperature |
|---|---|---|
| O | ionized and neutral helium, weakened hydrogen | above 31,000 K |
| A | strong hydrogen, ionized metals | 7100-9750 K |
| F | weaker hydrogen, ionized metals | 5950-7100 K |
| G | still weaker hydrogen, ionized and neutral metals | 5250-5950 K |
What is the Harvard spectral classification system?
The Harvard Spectral Classification is based on the absorption lines (i.e. bark lines) in the stellar spectrum, that are sensitive to the stellar temperature, rather than to gravity or luminosity.
What color is the coolest star?
Red stars
What is the coldest color?
Based on the color wheel, we notice that some colors or their shades give us a feeling of warmth or coolness. Blue represents the coldest area in front of the orange (complementary color of blue see complementary colors) which, in turn, is the hottest sector.
What is the color of the coldest star?
red
What is the hottest star in the universe?
The Wolf-Rayet star WR 102 is the hottest star known, at 210,000 K.
What is the rarest star type?
The rarest type of star is the type O star. It is the largest of the main sequence stars. In the entire milky way galaxy there are estimated to only be 20,000 of these stars or one in 20,00,000.
Which is the hottest star color?
blue
What star in the sky is red?
Antares is an eye-catching star, shining with a distinctive bright red sparkle on northern summer evenings. In the Southern Hemisphere, it’s a red beacon in winter evening skies. This star, also known as Alpha Scorpii, lies about 550 light-years away.
Which star is the bluest?
Now that we’re enjoying the spring season in the Northern Hemisphere we can observe a bright, blue star crossing our southern horizon during the evening hours – that star is Spica or Alpha Virginis (Spica lies in the constellation of Virgo).
What is the most brightest star?
Sirius A
What is the brightest color in the world?
By another definition pure yellow is the brightest, in that it most closely resembles white. Blue is perceived as closest to black. This illustrates how there can be several definitions of perceived brightness. The latter is sometimes said to be related to “saturation discrimination.”
What planet is the brightest?
Venus
What are the two brightest stars?
From latitudes south of the equator, both Canopus and Sirius – the sky’s two brightest stars – appear high in the sky, and they often appear together. They are like twin beacons crossing the heavens.
What is the name of Orion’s dog?
Canis Minor and Canis Major are his dogs, the one in front is called Procyon. They chase Lepus, the hare, although Hyginus says some critics thought this too base a prey for the noble Orion and have him pursuing Taurus, the bull, instead.
What color stars are the brightest?
Blue stars