Category Archives: astrophysics

Are Wrinkled Lightsails Less Efficient?

Just watched a small explanatory video by Bill Nye on the Planetary Society’s LightSail 2 spacecraft (not exactly the same one as the one attached to this post but essentially the same). And by the end some voice in my … Continue reading

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300+ years to solve Newton’s 3 Body Problem

A few decades back I wrote a screen saver for Windows that relied on Newton’s laws of gravity to drive things around the screen. It was the bouncing line with a difference: the ends of the line had ‘mass’ and … Continue reading

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Stretching Conventional Wisdom Too Far

Today found me reading an article (https://phys.org/news/2019-10-giant-radio-galaxies-defies-conventional.html) about research into the far distant universe. In this case the research was “New research on giant radio galaxies defies conventional wisdom”. The article begins with this summation: Conventional wisdom tells us that … Continue reading

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How Your Measuring Tool Was Made Makes A Difference In Cosmology

Last week I wrote about a dawning realization in Cosmology that White Dwarf stars may be older than previously thought. There are likely implications for how this might affect predicted values of distance and age of the regions they live … Continue reading

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Big News On Dwarf Stars Rejigs Stellar Clocks

Stars like our Sun get old and become Red Giants. Then they get older and eventually Shed Their Skins (outer layers) leaving behind a remnant which we call a White Dwarf. White dwarf stars are some of the oldest stellar … Continue reading

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Panspermia Gets Another Boost

Panspermia gets another boost. For those who don’t know panspermia is the theory that life may not have started here on earth. It might have come on comets or meteoric dust particles that drift into the earth’s gravity well and … Continue reading

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Spacecraft Earth Has Another Shield

It would appear that Spaceship Earth has one more Shield against assault from space that we were not aware of. We’ve known for 60 years about the Van Allen Radiation belt. And the Ozone layer. These protective layers absord and … Continue reading

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