What are the 7 main types of stars?

What are the 7 main types of stars?

There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M. O and B stars are uncommon but very bright; M stars are common but dim.. An easy mnemonic for remembering these is: "Oh be a fine guy/girl, kiss me."

Which star type lives the longest?

The stars with the longest lifetimes are red dwarfs; some may be nearly as old as the universe itself.

  • Red Dwarf Stars. Astronomers define a red dwarf as a star having between about 0.

    What is the most common star?

    Red dwarfs

    Which star is coldest?

    The temperatures on this brown dwarf - a star without the mass to burn nuclear fuel and radiate light - is between minus-54 and 9 degrees Fahrenheit. Brown dwarfs lack the mass to shed light or much heat, making them hard to detect without a telescope that can use an infrared lens.

    What star is the coolest star?

    Since the temperature of a star can determine its visual color, this category scheme is known as spectral type. The main categories of spectral type are M, K, G, F, A, B, and O. The coolest stars (red dwarfs) being M, and the hottest stars being O. Our own Sun is a G star.

    Which star is the youngest?

    If proven, the newly discovered neutron star will be the youngest one known by humanity, beating the current youngest supernova remnant is Cassiopeia A, which is 330 years old that can be found 11,000 light-years away from Earth and can be found within our galaxy.

    What is the rarest star in the universe?

    Now astronomers have spotted a bizarre star that may prove to be one of the rarest objects ever, with maybe as few as five or six of them in the galaxy. The object in question is known as J005311, located in the constellation Cassiopeia about 10,000 light-years from Earth.

    What star has the most energy?

    Brightness and power
    Most energetic starR136a1B=-12.

    How does a star die?

    Stars die because they exhaust their nuclear fuel. ... Really massive stars use up their hydrogen fuel quickly, but are hot enough to fuse heavier elements such as helium and carbon. Once there is no fuel left, the star collapses and the outer layers explode as a 'supernova'.

    Which star has the highest gravity?

    Neutron stars are known that have rotation periods from about 1.

    What is the hottest star ever discovered?

    The hottest known star, WR 102, is one such Wolf-Rayet, sporting a surface temperature more than 35 times hotter than the Sun.

    What is the least massive star on the chart?

    Smallest stars by type The red dwarf stars are considered the smallest stars known, and representative of the smallest star possible. Brown dwarfs are not massive enough to build up the pressure in the central regions to allow nuclear fusion of hydrogen into helium.

    Can humans survive 2 times gravity?

    As you can see, people can easily tolerate 2g's for extended periods of time, so there's not much immediate danger of being on a planet with 2 g gravitational acceleration. The problems will most likely start in the long term.