Blog Archives

In Saturn’s Shadow

One of the most astounding images of the space age is about to be replicated. Take a look at this image of a backlit Saturn eclipsing the sun. This is a mosaic of images taken over three hours in September,

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Posted in Planets, Solar System, Spacecraft

Is Interplanetary Space Too Hot For Humans?

Radioactively hot, that is. While the Curiosity Mars Rover was cruising for eight months between Earth and Mars, one of the instruments aboard was measuring the radiation levels encountered along the way. The Radiation Assessment Detector—RAD—was inside the spacecraft, shielded

Posted in human spaceflight, Mars, Solar System, Spacecraft

Weekend Sky Show

The two brightest planets in the sky, Venus and Jupiter, have been drawing closer and closer to each other as seen from Earth for the past several days. This weekend they will be joined by the hard-to-see innermost planet Mercury

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Posted in Planets, Sky Phenomena, Solar System

Catch a Comet

This week, Comet PANSTARRS will be a naked eye object for observers in the northern hemisphere. But you need to be quick–it is low on the western horizon, close to the sun. If you are too early, the sky is

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Posted in Sky Phenomena, Solar System

Warning: 14-Year-Old Geek Ahead

Most people my age who have wound up in some sort of a science-related career (and many who have not) can trace their excitement about the subject to the space programs of the late 1950s and 1960s. I’m no exception.

Posted in human spaceflight, John Glenn, Lynchburg College, Mars, Solar System

Lots of Links About Asteroids

The nearly simultaneous and completely coincidental occurrences of a near miss by an asteroid and the biggest meteor to hit the Earth in more than a century have prompted a lot of questions. There is so much that is fascinating

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Posted in Sky Phenomena, Solar System

Close Only Counts In Horseshoes

At about 2:30 p.m. EST on February 15th, 2013, a 50 meter (150 feet) diameter asteroid will approach within 28,000 km (17,000 miles) of the Earth, traveling at about 8 km/s (18,000 mph). Should you be worried? That depends on

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Posted in Solar System

A Pattern And A Puzzle

In my previous post, I talked about the strong evidence for the presence of water ice in permanently shaded crater floors around the north pole of Mercury. Part of the evidence for this was the thermal modeling of surface and

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Posted in Planets, Solar System

The “What Ifs?” of Science Fiction

If someone were to ask people who have one way or another made a career out of science or technology what they read in their childhood, the chances are very good that the common thread would be science fiction. I

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Posted in human spaceflight, Planets, Solar System

Survivor

The formation of our solar system, with multiple planets and other bodies of varying sizes and compositions—this was not a simple process. The more planetary systems we discover around other stars, the more we confirm the truth of this. Scientists

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Posted in Solar System, Spacecraft