Is this a statement or a question?
Hi!
14. Star clusters are held together by gravity. It really depends how old a star in the cluster is - it could be just born, or could have been born hundreds of billions of years ago. Astronomers categorize them by different colors, temperatures, sizes, brightness, etc.
15. Open clusters eventually disperse to form field stars.
16. Our sun is not part of a cluster (although it used to be).
17. Globular clusters<span> </span>are<span> found in the ring of a galaxy and usually contain more stars and </span>are<span> much older than the </span>open clusters.
18. Omega Centuari and M13.
Hope this helps!
it was Louis Pasteur(1822-1895) a French chemist first discovered what causes illness hope this helps!
According to the research, if the receptor on the postsynaptic membrane binds to norepinephrine, the synapse is called adrenergic.
<h3>What is the adrenergic synapse?</h3>
It is the molecular complex that selectively receives the signal of adrenaline and noradrenaline in the body's cells.
It is involved in various functions of the sympathetic nervous system, which involves fight and flight responses.
Therefore, we can conclude that according to the research, if the receptor on the postsynaptic membrane binds to norepinephrine, the synapse is called adrenergic.
Learn more about adrenergic receptors here: brainly.com/question/14586796
#SPJ1
