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We have no way of predicting accurately where intelligent life can exist, we can only predict where human or earth-based life can exist. Life is a self-repeating chemical system, and it can potentially exist in any solar system, even on frozen moons that still have warm cores. Life that would be truly "alien" to us might even exist in the cold, seemingly dead space between stars, we can't know.

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Q: What is the spectral class of stars where intelligent life can exist?
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Related questions

What is the least luminous spectral class?

Spectral class Y, which is typical of "brown dwarf" stars.


What is spectral class?

Spectral class is classification of stars by their external features..Like light,temperature etc..


Why are there no massive O and B stars?

There are stars with spectral classes of O & B (e.g. Rigel) R136a1 is a star of the spectral class WN5h. Wolf Rayet stars have this kind of spectral type.


Two stars of the same spectral class must have the same what?

temperature


How common are sun like stars?

Our Sun has a spectral class of G (Yellow dwarf). About 1 in 13 stars, in our solar neighbourhood are within this class


Is spectral class B in space hot or cold?

Spectral class is the categorization of stars by temperature and size, mostly the former. Spectral class B is very hot. In descending order (hottest to coolest) the spectral classes are O,B,A,F,G,K,M. You can see that B is very near the top.


What type of star is Star A?

Red stars (Red dwarfs and red giants) have a spectral class of M.


What type of star is a red star?

Red stars (Red dwarfs and red giants) have a spectral class of M.


What is the name of an orange star?

Typically orange stars have a spectral class of K. Examples are:ArcturusAldebaranAlpha Centauri B


Is spectral type k hotter then spectral type a?

No. K spectral type stars (which are orange) temperature is ranging from 5,000-3,500. A spectral type stars (which are blue-white) temperature is ranging from 7,500-11,000.


What is a Subdwarf star?

A star with luminosity class VI under the Yerkes Spectral Classification System. They have luminosity 1.5 to 2 magnitudes lower than main-sequence stars of the same spectral type.


Why do stars of spectral class M not show strong lines of hydrogen in their spectra?

their surfaces are so cool that most hydrogen is in the ground state.