The main sequence is a map of star brightness against their temperature. Stars that lie on the main sequence in the top left are the high mass stars. Cooler, smaller stars lie near the line at the lower right.
The main reasons are: There is lower air pressure, and there is lower air density. You do technically get closer to the sun, however the distance to the sun is so much greater that it doesn't really have an effect. So just those two reasons!
The H-R diagram of a young star cluster shows a main sequence stretching from upper left to lower right, where stars are fusing hydrogen in their cores. It also may include some young, pre-main sequence stars located above and to the right of the main sequence, which are still contracting and heating up. Additionally, there might be some high-mass, short-lived stars in the upper region of the diagram, and low-mass, long-lived stars in the lower region.
I think you're asking if the Sun should be in upper or lower case. If referring to the star at the centre of our Solar System, then the Sun is in upper case. If you're referring to a sun outside of our Solar System then it is in lower case.
carbon dioxide or co2
Mercury has no significant atmosphere.
lower extreme,upper extreme,upper quartile, lower quartile, and the median
farming
The upper, lower and middle course.
phosphoilpid
Nitrogen and Oxygen
lower and upper respiratory system
The main difference between the Upper Peninsula and Lower Peninsula of Michigan is their geographical location. The Upper Peninsula is located to the north and is less populated with vast wilderness and natural beauty, while the Lower Peninsula is located to the south and is more densely populated with major cities like Detroit and Lansing.
Hydrogen and Oxygen
Primary (baby) teeth: A. the 2 lower central incisors +4 upper incisors B. upper and lower first molars (bicuspids) C. upper and lower cuspids (canine) D. upper and lower second molars Secondary (adult) teeth: A. upper and lower central incisors and first molars B. upper and lower lateral incisors C. upper and lower molars (bicuspids) D. upper and lower second molars E. upper and lower third molars (about 18 years old) Why? The theory is that the periodontal ligament provides the main way with the shrinking and cross-linking of collagen fibers.
Nitrogen (which makes up about 78% of the atmosphere) and Oxygen (about 21%)
Main componets of an ecosystem are its Flora and Fauna