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If you keep the dust caps on your telescope when it is not in use and avoid handling the

lenses or mirrors, only minimal optical maintenance of your telescope should be required.

Extensive cleaning is usually only necessary every few years.

What to Look For in the Sky

There is a whole universe of objects you could view at night, so where do you start? We

recommend starting with the most prominent objects first.

The moon

The moon is the easiest target to find at night. When the moon is in full position, it bathes

the night with a silvery light that washes the sky of all but the brightest objects. The best

time to view the moon is not when it is full, but rather when it is less than half full. The

dividing line between dark and light on the moon, called the terminator, shows the best

detail in the craters and mountains.

The planets

The planets, our solar system companions, range in size from moon-size rocky bodies to

giant gas balls, which could hold Earth 1000 times over. To find the planets, you will need

information about their times of visibility. An astronomy magazine will give you the

locations of the planets, as they change position from month to month. The Internet is also

an excellent source of information, starcharts, maps, and more! The popular and more

familiar constellations often provide the easiest landmarks to help find the planet's

locations and paths of orbit. Most people have looked up at night and seen some of the

planets without even realizing it. A planet appears like a bright star but does not twinkle

like a star; it will look like a tiny ball. Venus, Mars, Jupiter, and Saturn, are the easiest

planets to view. Mercury is dimmer, usually below the horizon, and is more challenging to

find.

Each of the planets provides interesting views. Venus is covered with clouds so all that is

visible is an extremely bright light, the brightest next to the moon. Venus, like the moon,

goes through phases, however. As it travels around the sun, different areas of the planet's

surface are illuminated, producing crescent shapes of varying size. Mars is the red planet.

When it is above the horizon, it is noticeably red and stands out like a beacon in the night

sky. The apparent brightness of Mars varies as the planet orbits around the sun and

throughout its period of visiblity, it will brighten and dim depending on how near or far it is

from Earth.

Jupiter is the largest planet in our solar system and the second brightest next to Venus.

Jupiter has many moons, four of which are often visible through your telescope, when

viewing conditions permit. As you watch them throughout the evening, you will see that

they change position relative to each other and to Jupiter. It is possible with careful

planning to actually see one of the moons disappear either in front of or behind Jupiter as

it orbits around the planet.

Saturn, the second largest planet, is not as bright as Jupiter and so its moons are not as

visible through small telescopes. The large rings that encircle Saturn are spectacular to

observe, however. The planet and its rings appear pale yellow.