Brian Ventrudo

Science of Stargazing – Star Distances and Motion

There was a time, less than 200 years ago, when astronomers had not yet measured the distance to the stars. It's a tricky measurement, but the basic idea of how to find the distance to the stars is fairly simple. Also this month you also get an overview of the motion of stars in the galaxy, and a look at observing double stars, one of the most unde...

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Deep Sky Tours – July

Filed Under: Fundamentals of Stargazing

M57, the Ring Nebula
This month you look at a good range of objects: resplendent open and globular star clusters, superb double stars, and a fine planetary nebula. Compared to the faint galaxies you toured last month, most of these objects are quite easy to see. And they are favorites of most experienced stargazers. As you master the art of stargaz...

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Sky Tours (South) – July

Filed Under: Fundamentals of Stargazing

Scorpius
While winter is now underway in the southern hemisphere, the Earth has turned into a position to reveal the thick band of the Milky Way nearly overhead at southern latitudes. This is one of the most spectacular sights in all of nature. Here you look towards the center of our galaxy from our position near the edge of its flat disk. This mon...

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Sky Tours (North) – July

Filed Under: Fundamentals of Stargazing

This month you examine the stars of northern summer along with the prominent constellations Lyra, Ophiuchus, Serpens, and Scorpius. Overhead you see the blue-white glow of the bright star Vega. And as you look to the east, you once again see brighter stars along the rising plane of the Milky Way. Dominating the southeastern sky, the star Antares, a...

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Solar System Observing – Lunar Seas and Craters

Filed Under: Fundamentals of Stargazing

This month you tour the most visible features on the face of the Moon, the dark lunar maria or 'seas'. While their name is misleading-- these seas are bone dry-- these features tell us quite a bit about the early history of the Moon and the inner solar system. After touring these features, you also get a look at the types of craters visible on the ...

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