Tag Archives: space

Milankovitch Cycles – Eccentricity

In the post on Milutin Milankovitch I said I would be discussing the Milankovitch cycles and their impact on Earth’s climate. There are three main cycles in Earth’s relationship to the Sun that have been shown to have an effect … Continue reading

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Evolution – Part Two

Some years ago I published a series of articles about evolution in my local newspaper. It generated some interest and a spate of letters to the editor, and my publisher liked it. There was even a creationist who challenged me … Continue reading

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Evolution – Part One

Evolution: A gradual process in which something changes into a different and usually more complex or better form. The Free Dictionary, definition 1(a). Some years ago I published a series of articles about evolution in my local newspaper. It generated … Continue reading

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20 Big Questions about the Future of Humanity

Scientific American has asked some scientists what they call “20 big questions about the future of humanity.” Not all of the questions are strictly about humans, but most of them are, and I think we can forgive them for those … Continue reading

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Cassini’s Last Dance

The Cassini space probe is nearing the end of its life. Cassini is the spacecraft that NASA sent to explore Saturn. It arrived at the ringed planet in 2004, and here are a couple of pieces I wrote about it … Continue reading

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Interstellar Seeds Could Create Oases of Life

In 2004 I wrote a short piece for my local newspaper in which I speculated about the possibility of comet impacts splashing chunks of Earth back into space, and some of the life in those chunks surviving long enough to … Continue reading

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Alien Life on Titan

I thought I had published this article on solvent as the medium for life. I guess I was wrong. Today I was reminded of it by this article about some scientists who are trying to figure out what kind of … Continue reading

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radioISS

Have you ever wondered what they listen to on the International Space Station? When Commander Chris Hadfield puts down his guitar, that is. You can see his cover of David Bowie’s Space Oddity here, by the way. Check this link … Continue reading

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Sprites

Cloud of the Day – Sprites Another non-cloud cloud of the day, sprites are electrical phenomena. They emanate upward from the tops of thunderclouds, as lightning plays around the bottoms. Sprites weren’t caught on film before 1989, and only seriously … Continue reading

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Aurora

Cloud of the Day – Aurora Aurora is not clouds. Clouds can’t form in the tenuous wisps of atmosphere found at the heights, approximately 90 – 1,000 kilometers, where aurora occurs. Therefore, it is wrong for me to call aurora … Continue reading

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