Saturday, December 12, 2009

How to Observe Meteors

One of the good things about meteors is that you don’t need any equipment, just your eyes and a bit of patience.  Even in a so called ’shower’ it is rare to get more than one meteor a minute, don’t be surprised if you see nothing for five or ten minutes, then two in a row.

Find an area outside which has a wide view of the sky, is away from bright lights.  You want your view of the sky to be as light free as possible to improve your chances of seeing more meteors.  Also allow a few minutes for your eyes to adapt to the dark, you will then be able to see the fainter meteors which are more common.

The key to watching meteors is being comfortable and keeping your gaze on the sky.  Dress warmly because in the middle of the night and early hours of the morning it can be quite cold.  Lie on the ground on a rug, with a sleeping bag or blanket, or sit on a reclining garden chair so you can spend as much time as possible looking up without craning your neck.  Standing and looking up for long periods can be uncomfortable and will reduce your chances of seeing those ‘wow’ meteors.

Credit: science.nasa.gov

Credit: science.nasa.gov

Try to keep your gaze on the sky for as long as possible, many people have missed that perfect meteor when they looked away.  This is very annoying, especially when everyone else saw it but you didn’t!  You will also see aircraft and satellites, mostly in the couple of hours after dusk and before dawn.

Meteors can appear in any part of the sky.  If a shower is in progress it usually helps to look about 45 degrees either side of the radiant and about 30 degrees up. Looking straight at the radiant means you will see meteors head on and with very short trails, looking to one side of the radiant gives a reasonable length of trail but is still close enough to catch the majority of meteors. Looking about 30 degrees up means you are looking through a larger volume of air than when looking overhead, which should catch more meteors, but is still high enough to be above the haze.

Most meteors appear as a bright streak of light lasting less than a second but some may be more dramatic and leave behind persistent trains lasting several seconds.  This can be very obvious with the Geminid Meteor shower.

If there is a shower in progress then over the course of the evening you may begin to notice that most of the meteors radiate from a particular part of the sky.  You can plot the paths of the meteors on a sky map to keep a record of their directions.  Maps can be photocopied from a star atlas or downloaded from skymaps.com.  The more experienced observers keep records of the number of meteors they see and the directions they come from, which allows us to predict the behaviour of the showers in future years.

The most import thing to do is relax, sit back and enjoy.

[Via http://newburyas.wordpress.com]

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