by APOD Robot » Mon Mar 15, 2021 4:05 am
Meteor Fireballs in Light and Sound
Explanation: Yes, but have you ever
heard a meteor? Usually, meteors are
too far away to make any audible sound. However, a
meteor will briefly create an
ionization trail that can reflect a distant radio signal. If the geometry is right, you may
momentarily hear -- through your radio -- a distant radio station even over
static. In the
featured video, the sounds of distant radio transmitters were caught reflecting from large meteor trails by a sensitive radio receiver -- at the same time the
bright streaks were captured by an
all-sky video camera. In the video, the
bright paths taken by four
fireballs across the sky near
Lamy,
New Mexico,
USA, are shown first. Next, after each static frame, a real-time video captures each
meteor streaking across the sky, now paired with the sound recorded from its radio reflection. Projecting a meteor trail down to the
Earth may lead to finding its
impact site (if any), while projecting its
trail back into the sky may lead to identifying its
parent comet or asteroid.
[url=https://apod.nasa.gov/apod/ap210315.html] [img]https://apod.nasa.gov/apod/calendar/S_210315.jpg[/img] [size=150]Meteor Fireballs in Light and Sound[/size][/url]
[b] Explanation: [/b] Yes, but have you ever [i] heard [/i] a meteor? Usually, meteors are [url=https://earthsky.org/space/whoosh-can-you-hear-a-meteor-streak-past]too far away[/url] to make any audible sound. However, a [url=https://solarsystem.nasa.gov/asteroids-comets-and-meteors/meteors-and-meteorites/overview/]meteor[/url] will briefly create an [url=https://en.wikipedia.org/wiki/Meteor_burst_communications]ionization trail[/url] that can reflect a distant radio signal. If the geometry is right, you may [url=https://i.pinimg.com/originals/f3/aa/fd/f3aafd5b31e81165473be45d67383a33.jpg]momentarily hear[/url] -- through your radio -- a distant radio station even over [url=https://www.scientificamerican.com/article/cosmic-radio-background/]static[/url]. In the [url=http://www.heliotown.com/Fireballs.html]featured video[/url], the sounds of distant radio transmitters were caught reflecting from large meteor trails by a sensitive radio receiver -- at the same time the [url=https://apod.nasa.gov/apod/ap011119.html]bright streaks[/url] were captured by an [url=https://apod.nasa.gov/apod/ap090817.html]all-sky video camera[/url]. In the video, the [url=https://apod.nasa.gov/apod/ap130218.html]bright[/url] [url=https://apod.nasa.gov/apod/ap110123.html]paths[/url] taken by four [url=https://apod.nasa.gov/apod/ap990219.html]fireball[/url]s across the sky near [url=https://en.wikipedia.org/wiki/Lamy,_New_Mexico]Lamy[/url], [url=https://youtu.be/unghDml5F_4]New Mexico[/url], [url=https://www.cia.gov/the-world-factbook/countries/united-states/]USA[/url], are shown first. Next, after each static frame, a real-time video captures each [url=https://apod.nasa.gov/apod/ap200912.html]meteor streaking[/url] across the sky, now paired with the sound recorded from its radio reflection. Projecting a meteor trail down to the [url=https://solarsystem.nasa.gov/planets/earth/overview/]Earth[/url] may lead to finding its [url=https://apod.nasa.gov/apod/ap090328.html]impact site[/url] (if any), while projecting its [url=https://www.discovermagazine.com/the-sciences/meteor-hunters-track-fireballs-in-the-night-sky]trail back[/url] into the sky may lead to identifying its [url=https://apod.nasa.gov/apod/ap180808.html]parent comet or asteroid[/url].
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