Tag Archives: astronomy

NASA Image and Video Library

You might be aware of the website dedicated to the Astronomy Picture of the Day (APOD.) You can visit the site and see another great picture every day. Some people even set things up so their computer’s desktop image is … Continue reading

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Will Pluto Be a Planet Again?

And will the Moon soon be one too? As mentioned in my post Size – Solar System, Pluto lost its planetary designation over ten years ago. In 2006, the International Astronomical Union demoted Pluto from planet status to that of … Continue reading

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Milankovitch Cycles – Other

See the previous posts on Milankovitch cycles: orbital eccentricity, axial obliquity and axial precession. There are two more cycles to consider in this increasingly complex story of the astronomical cycles affecting Earth’s long-term climate. The first is another form of … Continue reading

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Milankovitch Cycles – Precession

In the two previous posts on Milankovitch cycles — Eccentricity and Obliquity — we looked at the changing shape of Earth’s orbit around the Sun, and the changing tilt of Earth’s axis respectively. In this post we look at the … Continue reading

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Milankovitch Cycles – Obliquity

This is the second of the three main Milankovitch cycles that I said we’d cover in my original post on Milutin Milankovitch. The first cycle was Earth’s orbital eccentricity, or how elliptical the orbit is. We found that this changing … Continue reading

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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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Milutin Milankovitch

Milutin Milankovitch (Milankovic) was a Serbian scientist, born in 1879 in the village of Dalj, in present-day Croatia. It was then part of the Austro-Hungarian Empire. At 17 he took up Civil Engineering at the Vienna University of Technology, going … 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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