Stellar classification

In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with absorption lines. Each line indicates an ion of a certain chemical element, with the line strength indicating the abundance of that ion. The relative abundance of the different ions varies with the temperature of the photosphere. The spectral class of a star is a short code summarizing the ionization state, giving an objective measure of the photosphere's temperature and density.

Most stars are currently classified under the Morgan–Keenan (MK) system using the letters O, B, A, F, G, K, and M, a sequence from the hottest (O type) to the coolest (M type). Each letter class is then subdivided using a numeric digit with 0 being hottest and 9 being coolest (e.g. A8, A9, F0, F1 form a sequence from hotter to cooler). The sequence has been expanded with classes for other stars and star-like objects that do not fit in the classical system, such as class D for white dwarfs and class C for carbon stars.

Podcasts:

developed with YouTube
PLAYLIST TIME:

Latest News for: spectral class

Edit

Here’s What We Know About Earth’s Temporary Mini-Moon

Universe Today 21 Nov 2024
... such as the force of gravity.) They also explored the spectral class of the asteroid from reflectance spectra analysis obtained with the OSIRIS spectrograph and assessed its rotational properties.
Edit

In a post-Baldur's Gate 3 world, was Metaphor: ReFantazio right to ditch romance?

Games Radar 22 Oct 2024
Between Dragon Age ... Atlus is no stranger to love ... With Metaphor ... Was this Atlus striking out with a similar aim? Yet, it turned out that while building relationships was vital to powering up your spectral archetypes in the class system, Metaphor ... James.
Edit

Spacetech firm raises 59 croresb

The Times of India 07 Oct 2024
... hosting synthetic aperture radar (SAR) and multi-spectral optical sensors together using the XDSAT-M600 platform for a customer, which is scheduled to be launched in the third quarter of 2025.
Edit

Hyd spacetech startup XDLINX Space Labs raises $7m via seed round led by ace investor Ashish Kacholia

The Times of India 07 Oct 2024
... hosting synthetic aperture radar (SAR) and multi-spectral optical sensors together using the XDSAT-M600 platform for a customer, which is scheduled to be launched in the third quarter of 2025.
Edit

Nostalgic PHOTOS of Soviet teachers

Russia Beyond 05 Oct 2024
A singing class at the Central School of Music in Moscow, 1964 ... At a class in the laboratory of spectral analysis, Magnitogorsk, Chelyabinsk Region, 1954 ... A geography class in a women's school, Leningrad, 1954 ... Young students in class, 1980s.
Edit

Destiny 2 Rolls For Initiative With Dungeons & Dragons Crossover

Gamespot 31 May 2024
Like previous collaborations, players will be able to don stylish armor sets inspired by the popular tabletop game franchise, including Faerûn inspired armor for all classes.
Edit

Three new RR Lyrae variable stars discovered

Phys Dot Org 16 May 2024
As a result, they discovered three new RR Lyrae variable stars in the vicinity of this galaxy ... In general, RRLs are pulsating horizontal branch (HB) stars of spectral class A or F, with a mass of around half the sun's ... More information ... DOI ... arXiv ... ....
Edit

Summer Reading 2024

The Atlantic 14 May 2024
Life, then, is more spectral than categorical, more verb than noun,” he explains. It is “not a distinct class of matter, nor a property of matter, but rather a process—a performance.” Plankton release ...
Edit

Astronomers discover a rare eclipsing X-ray binary

Phys Dot Org 20 Mar 2024
Spectroscopic observations have revealed that the companion star in Swift J010902.6-723710 is a B0-0.5 star of spectral class Ve ... J010902.6-723710 as it represents the rare class of eclipsing BeXRBs.
Edit

BARREL ENERGY ANNOUNCES CREATION OF ARTIFICIAL INTELLIGENCE MINING CENTER

Enid News & Eagle 12 Feb 2024
Spectral AI Hyderabad’s engineers have employed best-in-class technology, leading-edge research, and their strategic expertise to produce a proprietary AI engine the continuously learns and adapts to ...
Edit

Look Up

The Daily Journal - San Mateo 27 Jan 2024
Keenan, who introduced it 1943.There are eight spectral classes, each similar to a range of surface temperatures — from the hottest to the coldest, these are O, B, A, F, G, K, M and L. Each spectral ...
Edit

What’s Celestial Snow Angel? NASA's Hubble telescope captures awe-inspiring emission nebula image

Pinkvilla 26 Jan 2024
By. Published on Jan 26, 2024  .  06.14 PM IST .  739 ... follow us. share. Key Highlight ... The core star has an estimated surface temperature of 37,000 Kelvin and belongs to the O8 spectral class ... Related Stories. trending ... trending ... .
Edit

Earth-observation satellite commissioned

China Daily 24 Jan 2024
Several world-class apparatuses on the satellite, including a wide thermal infrared imager and an advanced hyper-spectral imager, will help scientists track greenhouse gases such as nitrogen dioxide ...
Edit

CNSA commissions advanced Earth-observation satellite

ECNS 24 Jan 2024
Several world-class apparatus on the satellite, including a wide thermal infrared imager and an advanced hyper-spectral imager, will help scientists track greenhouse gases such as nitrogen dioxide and ...
Edit

LIVE MUSIC IN ARKANSAS: Lucious Spiller among New Year’s Eve performers

Arkansas Democrat-Gazette 27 Dec 2023
THURSDAY. LITTLE ROCK. ◼️ Copper Mule Table & Tap. 5705 Kavanaugh Blvd. (501) 916-9533; coppermuletableandtap.com. 6 p.m.. Christine DeMeo. ◼️. 9700 N ... Adam Faucett & The Spectral Class, Colour Design, Shinfo, Skull of the Americas, B.L.A.S.T ... .

Most Viewed

×