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241. Phil Plait's Bad Astronomy: Mad Science
... Bad Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... When I sit on a "whoopee cushion" and let go of a balloon full of air, they both make noise. ... The reason a balloon or a whoopee cushion makes a sound is because when the air rushes out, it makes the lips of the hole vibrate, or move back and forth really fast. ... By changing the amount you stretch the hole, you can change the pitch, or note, that the sound makes. ... 2008 Phil Plait. ...
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Ссылки http://www.badastronomy.com/mad/1996/whoopee.html -- 19.1 Кб -- 09.04.2016
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242. Phil Plait's Bad Astronomy: Mad Science
... Bad Astronomy . ... Mad Science . ... Why are the traffic lights Red, Amber and Green ? Why not blue or purple ? ... You are right that red is most easily seen through a fog, and I think this is why stop lights are red. ... This means that in a fog, a blue light might be completely invisible to you because all the blue light has been scattered away, while a red light more easily penetrates the fog. ... This is why the oceans are blue; they absorb red light so that only the blue part gets out. ...
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Ссылки http://www.badastronomy.com/mad/1996/traffic.html -- 21.1 Кб -- 09.04.2016
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243. Phil Plait's Bad Astronomy: Mad Science
... Bad Astronomy . ... Bitesize Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Area of science: Astronomy . ... Does the sun rotate? What are sunspots, and how do they move on the surface? ... The last theory I heard about sunspots is that they are localized strengthenings in the Sun's magnetic field. For some reason, the Sun generates a local magnetic field that is very strong near the surface. ... 2008 Phil Plait. ...
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Ссылки http://www.badastronomy.com/mad/1996/sunspin.html -- 20.0 Кб -- 09.04.2016
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244. Phil Plait's Bad Astronomy: Mad Science
... Bad Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... How does the sun produce energy to burn? If we can duplicate this way of producing energy, can we have enough energy to last a long time? ... The Sun produces energy the same way a hydrogen bomb does! ... This is also the way a hydrogen bomb works, except that a bomb does its conversion of hydrogen to helium all at once, while the Sun does it nice and steadily over billions of years. ...
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Ссылки http://www.badastronomy.com/mad/1996/sunburn.html -- 20.2 Кб -- 09.04.2016
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245. Phil Plait's Bad Astronomy: Mad Science
Blog . ... Bad Astronomy . ... Bulletin Board . ... Bitesize Astronomy . ... Bad Astro Store . Mad Science . ... Site Info . Search the site . ... RELATED SITES . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Area of science: Earth Sciences . ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! Talk about Bad Astronomy on the BA Bulletin Board! ...
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Ссылки http://www.badastronomy.com/mad/1996/sprites.html -- 18.5 Кб -- 09.04.2016
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246. Phil Plait's Bad Astronomy: Mad Science
... Bad Astronomy . ... Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... If you were inside a massive hollow sphere, in a perfect vacuum, with edges of uniform thickness, which direction would you go because of gravitational pull between you and the edge of the sphere? ... In other words, no matter where you are in the sphere-- in the middle, or really close to the wall-- you feel no gravity. ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! ...
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Ссылки http://www.badastronomy.com/mad/1996/gravity.html -- 19.2 Кб -- 09.04.2016
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247. Phil Plait's Bad Astronomy: Mad Science
... Bad Astronomy . ... Bad Astro Store . Mad Science . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. Hey, it's either this or one of those really irritating PayPal donation buttons here. ... Area of science: Astronomy . ... The Cassini probe to Saturn is one of NASA's last ambitious planet probes. ... Cassini will first execute two gravity assist flybys of Venus, then one each of the Earth and Jupiter to send it on to arrive at Saturn in June 2004. ... 2008 Phil Plait. ...
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Ссылки http://www.badastronomy.com/mad/1996/cassini.html -- 20.4 Кб -- 09.04.2016
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248. Phil Plait's Bad Astronomy: Mad Science
... Bad Astronomy . ... Mad Science . ... Universe Today . ... Area of science: Astronomy . ... The recent findings of the Hubble Space telescope seem to indicate that galaxies at the edge of our instrumentation are very old despite the fact that the big bang theory would make them more bluish in colr instead of the red we see in the Hubble Wide field pictures. ... Most astronomers feel that the Big Bang is the correct idea, but of course the Universe is in the details. ... 2008 Phil Plait. ...
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Ссылки http://www.badastronomy.com/mad/1996/bigbang.html -- 21.2 Кб -- 09.04.2016
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249. Phil Plait's Bad Astronomy: Misconceptions
... Bad Astronomy . Misconceptions . ... Bad Astro Store . ... The brightest is obviously the Sun. The second brightest is the Moon. ... So why do so many people think you can't see it during the day? ... It orbits in roughly the same path that the Sun follows on the sky, so sometimes it must be between the Earth and Sun, putting it up in the sky at the same time as the Sun, that is, during the day. ... The Moon is easy to see during the day, if people would simply look up ! ... 2008 Phil Plait. ...
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Ссылки http://www.badastronomy.com/bad/misc/moonday.html -- 19.1 Кб -- 09.04.2016
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250. Phil Plait's Bad Astronomy: Bad TV
... Bad Astronomy . ... But faithful Bad Readers know who my dark heroes are in this category: the forces at NBC television. ... The wonderful irony of this is that NBC placed an ad for the movie in the TV Guide, which features an image of a bumpy lump headed for some large city, and a caption that reads "Experts say an asteroid may destroy the Earth in 30 years. ... So did NBC decide to rerun the movie "Asteroid", get it scheduled and get an ad into TV Guide sometime between those two announcements? ...
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Ссылки http://www.badastronomy.com/bad/tv/nbcrevamp.html -- 20.0 Кб -- 09.04.2016
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251. Phil Plait's Bad Astronomy: Bad News
... What's New? Bad Astronomy . ... News . ... Site Info . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Actually, I am always amazed that many people have not seen sundogs (or the even more common halo around the Sun) considering how common they are. I think two things are the cause: one is that people tend not to look at the Sun too closely (a good plan!), and the other is that people simply tend not to notice the sky around them. ... 2008 Phil Plait. ...
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Ссылки http://www.badastronomy.com/bad/news/sundogs.html -- 18.8 Кб -- 09.04.2016
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252. Phil Plait's Bad Astronomy: Bad News
... What's New? Bad Astronomy . ... News . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Scientific Research and Prejudicial Beliefs . ... John Stossel, a journalist for ABC news, was doing an hour long report on the differences between the sexes titled "Boys and Girls Are Different: Men Women and the Sex Difference". ... One researcher found that seven out of eight brain structures she studied were actually different in men and women. ... 2008 Phil Plait. ...
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Ссылки http://www.badastronomy.com/bad/news/steinem.html -- 20.6 Кб -- 09.04.2016
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253. Phil Plait's Bad Astronomy: Misconceptions
... Bad Astronomy . ... Bad Astronomy: The North Star, Polaris, is a very bright star. Good Astronomy: Polaris is a middling-bright star, easily missed. ... He said it was close to Polaris, the North Star, but he also said it was in the East. ... It's natural, I suppose, to think that such an important star should be bright, but really, that's a conceit, like thinking that the Earth is at the center of the Universe. If more people knew just why Polaris is the North Star, this Bad Idea would stop. ...
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Ссылки http://www.badastronomy.com/bad/misc/badpole.html -- 23.8 Кб -- 09.04.2016
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254. Phil Plait's Bad Astronomy: Mad Science
... Bad Astronomy . ... Mad Science . ... How fast must an object be travelling so the sound I perceive as it directly passes me will drop in pitch exactly one octave? ... When an object is moving past another object, any sound emitted by the first object is changed in pitch due to the relative motion. ... wl(emitted)" is the wavelength of sound emitted by the object at rest, "wl(heard)" is the wavelength you hear from the object, "v" is the velocity of the object, and "c" is the speed of sound. ...
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Ссылки http://www.badastronomy.com/mad/1997/doppler.html -- 21.9 Кб -- 09.04.2016
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255. Phil Plait's Bad Astronomy: Misconceptions
... Bad Astronomy . ... Bad Astronomy : The seasons are caused by the change in the distance of the Earth to the Sun. ... The change in distance of the Earth to the Sun is a very minor player. ... Well, not completely wrong; certainly the Earth's distance from the Sun has something to do with the temperature, but it is a relatively minor effect. ... Basically, the temperature depends only weakly on distance changes; the temperature goes as the inverse square root of the distance of the planet to the Sun...
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Ссылки http://www.badastronomy.com/bad/misc/seasons.html -- 28.4 Кб -- 09.04.2016
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256. Phil Plait's Bad Astronomy: Misconceptions
... Bad Astronomy . ... Bad Astronomy : The Moon appears larger on the horizon than overhead because you are comparing it to foreground objects. Good astronomy : The Moon does appear larger on the horizon, but it is because of the way we perceive the sky. ... The most common misconception is that it is because you are unconsciously comparing the Moon to foreground objects like trees and houses, or even the horizon itself, and that makes the Moon look bigger than when it is all alone in the sky. ...
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Ссылки http://www.badastronomy.com/bad/misc/moonbig.html -- 19.3 Кб -- 09.04.2016
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257. Phil Plait's Bad Astronomy: Misconceptions
... Bad Astronomy . Misconceptions . ... The Nine Planets . ... This is true, and so I have updated this page with a tidal force calculation. ... That way we can see right away how strong the other planets are; a gravity of 10 means the planet pulls on the Earth 10 times as much as the Moon does. ... So, in units of Moon gravity and tides, below are the forces on the Earth from rest of the planets (the data for masses and distances are from the wonderful page The Nine Planets ). ... 2008 Phil Plait. ...
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Ссылки http://www.badastronomy.com/bad/misc/planets.html -- 36.3 Кб -- 09.04.2016
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258. Phil Plait's Bad Astronomy: Bad TV
... Bad Astronomy . ... On Thursday, February 15th 2001 (and replayed on March 19), the Fox TV network aired a program called ``Conspiracy Theory: Did We Land on the Moon?'', hosted by X-Files actor Mitch Pileggi. ... Dust around the lander . ... However, it appeals to our common sense: when the sky is black here on Earth, we see stars. ... Bad: The program claims that when the top half of the lander took off from the Moon to bring the astronauts back into orbit, there was no flame from the rocket. ...
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Ссылки http://www.badastronomy.com/bad/tv/foxapollo.html -- 63.7 Кб -- 09.04.2016
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259. Phil Plait's Bad Astronomy: Review: Signs
Blog . ... Bad Astronomy . ... Bitesize Astronomy . Book Store . Bad Astro Store . ... Site Info . Search the site . ... Calendar/Events . ... RELATED SITES . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... FIND OUT IN MY SPOILERS REVIEW OF "SIGNS" . ... Check out my book "Bad Astronomy" . ...
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Ссылки http://www.badastronomy.com/bad/movies/signs.html -- 17.7 Кб -- 09.04.2016
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260. Phil Plait's Bad Astronomy: Bad Movies
... Bad Astronomy . ... Movies . ... Mad Science . ... SKIP TO THE LIST OF MOVIES . ... Most of the top-grossing movies of all time are science fiction... with emphasis on the word fiction . ... The movies may not be bad, but sometimes the science is. ... THE MOVIE LIST . ... The Internet Movie Database , a priceless and exhaustive list of every movie ever made. Science Fiction Science Blunders is an all-too-short website with brief descriptions of more generic science mistakes in TV and movies. ...
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Ссылки http://www.badastronomy.com/bad/movies/index.html -- 25.0 Кб -- 09.04.2016
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