Cada año millones de personas compran telescopios, pero pocas tienen una buena idea de qué deben buscar (o evitar) cuando vayan en busca de su instrumento nuevo.
Even when the air is perfectly clear, a significant fraction of starlight is lost in the atmosphere. And when there's a lot of haze or your target is close to the horizon, atmospheric extinction is a major problem.
Here are links to some websites that can help you predict where and when you'll get good transparency for deep-sky observing.
Would you like to be able to navigate your way around the night sky with confidence? Using this simple, easy-to-make Star Wheel, you can "dial the sky" for any time or date.
A quick download, some scissors, and a paper fastener are all it takes to use the stars to tell time.
Exploring the night sky is a fun activity for kids of all ages and it doesn’t require a lot of planning or equipment.
Sundials are amazingly simple yet effective devices. They range from sticks planted in the ground to precision-machined marvels costing thousands of dollars. The design shown here can be constructed in minutes from materials lying around your house, but it's surprisingly accurate.
Want to gaze at the Milky Way all night or peer into the eyepiece of a 12-foot-tall telescope? Then escape the city lights and head for the nearest “star party.”
You see much more of the universe in a steady view than in a jiggling view. Change your binocular observing forever with this easy-to-make stabilizer frame.
Here's all the essential information about the 88 constellations.
Here's a handy guide to the Greek letters that are used on star charts.
Ever since we first became serious about astronomy more than 20 years ago, we dreamed of having our own backyard observatory.
My current observatory is a multilevel structure. It began as a plan to mount my telescopes on the roof of a small barn on the property.
The backyard observatories of our editorial staff run the gamut from the elegantly simple to the luxuriously complete.
"Seeing" the atmospheric quivering that fuzzes out high-power views is the bane of every telescope user. Here's how to minimize its impact.
Three tools are commonly used to collimate Newtonian reflectors.
A no-nonsense primer to an astronomical rite of passage.
An easy guide to exploring the universe is just a quick download away. This PDF document contains valuable tips for beginner stargazers, a detailed Moon map, and six bimonthly star charts for either the Northern or Southern Hemisphere.
Astronomy doesn't deserve its reputation as a tough, expensive hobby. You just need to begin with the right advice.
Ready to voyage beyond the Solar System? Here's what you can see.
Without its spectral type, a star is a meaningless dot of light.
Why do larger numbers mean less light? Here's the story of astronomy's odd but beloved scheme for describing star brightnesses.
Accurate optical alignment is neither difficult, mysterious, nor time-consuming. In fact, it's only three steps away.
Tips to ensure trouble-free slewing for Go To telescopes
Ordinary binoculars are your ideal "first telescope." And they're so versatile that even seasoned stargazers find them indispensable.