Astronaut Chris Hadfield at the Ontario Science Center answering the most common question astronauts get. It grows more amusing as it goes along. Link: http://youtu.be/5JPuaRBTMKs And here is Hadfield’s YouTube channel, with a number of other videos worth watching. by … Continue reading
Today’s image at NASA’s Astronomy Picture of the Day site inspires one’s sense of wonder: Link: http://youtu.be/PDMp8a-YNe0 Several times now the Hubble Space Telescope has taken an extremely long-exposure image while aimed at an apparently empty patch of sky. In … Continue reading
The Perseid meteor shower will occur this weekend, and just in time for it, the XKCD web comic offers a table of annual meteor showers: Link: http://xkcd.com/1249/ by … Continue reading
Link: http://youtu.be/PoGXr6hUTD4 by … Continue reading
With Thomas Dolby: Link: http://youtu.be/BpRgY9GXLO0 by … Continue reading
An interesting article by Nathan Seppa in the February 9 Science News reports that rates of nearsightedness have been on the increase in recent decades in North America and Europe. For example, in the United States among people ages 12 … Continue reading
A website promoting asteroid mining has a remarkable interactive moving map of a multitude of known asteroids. It might take a little while to get used to the interface, but it’s a load of fun. The default appears to be … Continue reading
As you’ve no doubt already heard, on Friday an asteroid 150 feet across will pass closer to the Earth than our geosynchronous communications satellites, moving more than 17,000 miles per hour. There’s no risk of a collision this time, but … Continue reading
According to an article published last week in The Guardian (based on a report by Bloomberg New Energy Finance for the Business Council for Sustainable Energy), U.S. carbon dioxide emissions are at their lowest level since 1994. (A separate report … Continue reading
(Updated; see below.) I’m surprised that Minute Physics would get this wrong: Link: http://youtu.be/S9dqJRyk0YM It’s true that there’s no wavelength of light that’s pink and that the color magenta is basically white light with the middle wavelengths omitted. But despite … Continue reading