Yaks have handlebar horns, shoulder humps, horse-like tails and long shaggy skirts hanging nearly to the ground. Yaks can live up to 20 years and more. Cows average about 600-800 pounds and around 4.5 feet at the hump. Bulls average 1200-1500 pounds but can reach over 1600 pounds.
Brightness of stars is assigned a number starting with the brightest star starting at about -1 magnitude. Dimmer stars are zero or positive numbers. The larger the number means the dimmer the star is. For example, a star -1 magnitude is brighter than a star 0 magnitude. A star 0 magnitude is brighter than a star 1 magnitude. A star 1 magnitude is brighter than a star 2 magnitude. A star 4 magnitude is brighter than a star 5 magnitude. Magnitude sequence for stars starting with the brightest is -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 magnitude, ... etc. The decimal point is not used when star magnitudes are used on a star map. The decimal point could be confused for a star on the map.
View full size image. Sirius, also known as the Dog Star or Sirius A, is the brightest star in Earth's night sky. The name means glowing in Greek. With a visual magnitude of -1.46, the star is outshone only by several planets as well as the International Space Station.Because Sirius is so bright, it was well-known to the ancients.What came as a surprise to astronomers was the discovery of a companion star, Sirius B, in 1862.The companion is so much dimmer than Sirius â 10,000 times, in fact â that it wasn't until 2005 that astronomers were able to estimate its mass.ecause Sirius is so bright, it was well-known to the ancients. What came as a surprise to astronomers was the discovery of a companion star, Sirius B, in 1862. The companion is so much dimmer than Sirius â 10,000 times, in fact â that it wasn't until 2005 that astronomers were able to estimate its mass.