Tag Archives: space

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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Noctilucent

Cloud of the Day – Noctilucent You thought nacreous clouds were high? Well, at as much as 80,000 feet they are, but compared to noctilucent clouds, nacreous are practically scraping the ground. Like nacreous, noctilucent clouds are best seen when … Continue reading

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Size – Solar System

The American National Optical Astronomy Observatory has provided a model that can be used to visualize the size of the Solar System. Various objects are used to represent the Sun and planets, such as a ball for the Sun and … Continue reading

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Dark Flow

The known universe is about 27.4 billion light years across. It’s thought that the universe is bigger than that, possibly a lot bigger, but we can’t see farther than 13.7 billion light years in any direction. Our knowable universe is … Continue reading

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Interstellar Travel – Part Four

See also parts one, two and three. We’ve covered methods of interstellar travel that are achievable with presently understood technology, such as light sails and generation ships. We’ve also looked at methods that we can’t do yet but might be … Continue reading

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