2013年3月10日星期日

Bright Comet in the Evening Sky

Skywatchers in the northern hemisphere should enjoy a rare treat in the next few weeks, as Comet C/2011 L4 PANSTARRS enters the evening sky. Although the brightness of comets is notoriously difficult to predict, it looks as though this object may even be visible to the naked eye in the second half of March.Discovered by and named after the Pan-STARRS telescope in Hawaii, the comet was first detected in June 2011, when it was an extremely faint object 1.2 billion km from the Sun. Looking at its path, astronomers soon realised that it could become very bright at its closest approach to the Sun (perihelion) on 10 March this year.One amongst the most important lakes around Nainital is Bhim Tal named once Bhima of kasgar travel. The lake contains a tiny island surrounded by crystal blue water which reinforces its beauty.Like other comets of its type, PANSTARRS is thought to have originated in the Oort Cloud, a vast region containing millions of comets located more than two light years from the Sun. PANSTARRS travelled in towards the inner Solar system for millions of years, dormant for most of this time as a small nucleus made up of rock and ices. When comets approach the Sun, these ices heat up,The Naina Devi Temple located on the northern shore of Naini Lake may be a should visit travel to xinjiang. The temple is greatly visited by native devotees who supply their prayers to Goddess Naina. eventually turning to gases that jet out into space together with dusty material to form a head or coma around the cometary nucleus. Particles from the Sun (the so-called solar wind) blow the gases back in a straight tail,Spring cone crusher is providing a reliable guarantee for Jaw crusher waste recycling which is a problem more and more serious. whilst sunlight exerts a pressure on the dust particles to create a curved tail. The two tails and coma make up the classic comet familiar in so many astronomical images but are not always easy to pick out with the eye.Encouragingly, PANSTARRS has already been seen by observers in the southern hemisphere before perihelion, with reports that it is roughly as bright as the stars in the Plough and so is visible to the unaided eye.From bottles to other accessories, from food container to salt & pepper boxes, from Vsi crusher to canister, everything should be updated in your kitchen. Later this week (by 8 March) the comet should start to be seen from the northern hemisphere, although to begin with it may only be visible through binoculars or a telescope.By 12 and 13 March, PANSTARRS will be further from the Sun and should be easier to spot. To find it, skywatchers will need a clear sky, ideally be away from the lights of towns and cities and have a good western horizon. After sunsWater sports enthusiasts can avail of our china tour operators as swimming, sailing, kayaking and water skiing are popular activities on these islands.et on those dates the comet will be low down in the west and appear as a misty patch not far from the crescent Moon. Using binoculars will make it easier to find and will certainly help identify the tails which should point up from the horizon.

没有评论:

发表评论