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In the Oct. 21, 2016, edition of Mobile Astronomy, we examined how to use binoculars for astronomy, explained how they work and what to shop for, and suggested some night-sky objects to look at. This time, we'll cover some tips for making binoculars work better for you, highlight a type of binoculars that helps with unsteady hands and share a variety of targets to look for this summer.
Using binoculars for astronomy
Binoculars consist simply of a matched pair of small telescopes precisely mounted together to deliver a stereo image to your two eyes. The lenses at the front are called objectives. As with any optical device, the larger the area of those lenses, the more light they collect and concentrate into your pupils.
The small lenses you look into are called eyepieces or oculars, and they do the job of magnifying what you see. In binocular specification numbers, such as 7 x 50, the second number is the diameter of the objective lenses in millimeters and the "7x" means the binoculars will magnify by seven times.
A boat carrying 31 people capsized on a lake near Branson, Missouri, as thunderstorms moved through the area on Thursday evening.
Severe thunderstorms tracked across Iowa on Thursday afternoon with several tornadoes touching down across the state.
Se estima que la región puede ser de 2 a 3 veces más propensa que el resto de la nación
An uptick in monsoon rainfall is expected to heighten the flood threat across eastern and northern India this weekend and early next week.
After several dry days, the weather will take a downhill turn as NASCAR drivers gear up for the Foxwoods Resort Casino 301 in Loudon, New Hampshire, on Sunday.
A change in the weather pattern will favor periodic bouts of wet and stormy conditions as well as unusually cool air at times for the Midwest for the duration of July.
While it has long been known that volcanic eruptions can alter global climate patterns, less has been documented on the impacts of localized weather patterns following an increase in nearby activity.
An 11-million-ton iceberg hovers over the town of Innaarsuit in Greenland. The massive iceberg floats dangerously close to shore, threatening the small town.