The characteristics measured by semen analysis are only some of the factors in semen quality. One source states that 30% of men with a normal semen analysis actually have abnormal sperm function.
Wisps of dust and gas from the nebula which formed the star can also be seen. Credit: Atlas Image courtesy of 2MASS/UMass/IPAC-Caltech/NASA/NSF. Named for the first of their type observed, T Tauri stars are variable stars which show both periodic and random fluctuations in their brightnesses. They are newly-formed (< 10 million years old) low to intermediate mass stars (< 3 solar masses) with central temperatures too low for nuclear fusion to have started.
Alpha Centauri is a triple star in the Centaurus constellation, the fifth brightest star from Earth's view, and the closest star to Earth, besides the sun. Alpha Centauri's co â¦ ordinates are 14h 39m 36.4951s, â60Â° 50â² 02.308â³.lpha Centauri is the third brightest star from Earth's view. It is in the Centaurus constellation and only visible from Earth's southern hemisphere. It is the nearest bright â¦ star to our solar system, 4.34 light years away. An Alpha Centauri is the brightest star in the constellation Centaurus.