You should consult your carâs ownerâs manual for specific details; in general, if you are going to let a car sit for more than six months without being driven, you should change the oil beforehand and drive the car for at least ten minutes a month.
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.
It should be obvious that the sun should top the list. Using the scale as defined above, the sun has an apparent magnitude of -26.7. The full moon is about -11, the planet Venus (at its brightest) is about -5. The brightest star is Sirius (actually Sirius A because it has a companion, Sirius B) is listed at -1.46. The very best telescopes are able to observe visually to about +30 to +36 on this scale.