This large spiral galaxy, also designated Messier 31 and NGC 224, is 2.5 million light years from us, and covers an area of sky measuring 3 by 1 degrees (or six by two full moon diameters)! Under dark skies, M31 can be seen with unaided eyes as a faint smudge located a palm's wid...
A planet orbits a Sun-like star at an orbital distance of 40 AU. What is its orbital period? Johannes Kepler: Johannes Kepler developed the Laws of Planetary Motion in the 17th century. Kepler's 3rd law applies to this situation. The simplified formula to calcul...
However, this method is not perfect, and a self-diagnosis for this condition should be taken with a grain of salt. It’s also important to note that a child’s eyes may become misaligned for a shortperiodof time before returning to a correct alignment without intervention. Since accurately ...
If exophthalmos is severe or persistent, surgery may be required. It may need to be carried out during the active phase, if exophthalmos poses an immediate threat to your vision, or in the inactive period. Is Grave's disease hereditary?
SYFY’s The Ark takes viewers along for the ride on a one-way trip to Proxima centauri, a star 4.2 light-years from here. It’s a staggering trip which requires technology a century more advanced than our own; just getting out of the solar system is an overwhelming task. Their trip ...