|
Title: The Size of Asteroids Post by: Daphne on February 25, 2020, 01:28:47 pm This is fun! And it references some of the asteroids we've seen in FTZ. Size of asteroids compared to New York City (https://laughingsquid.com/size-of-asteroids-compared-to-new-york-city/).
Title: Re: The Size of Asteriods Post by: Geo on February 25, 2020, 09:19:13 pm Those are indeed some mean diameters. I wonder what the cup size of some of those are.
Title: Re: The Size of Asteroids Post by: ozymandias on February 26, 2020, 06:48:48 am This is fun! And it references some of the asteroids we've seen in FTZ. Size of asteroids compared to New York City (https://laughingsquid.com/size-of-asteroids-compared-to-new-york-city/). Also terrifying. Title: Re: The Size of Asteroids Post by: lifmcs on February 26, 2020, 08:57:37 am Also terrifying. Nah, Jupiter's got our back. (https://www.reddit.com/r/educationalgifs/comments/f8ious/this_is_how_jupiters_gravity_protects_earth_from/) It's let us down a few times in the past, but all of the ones in this video, especially the larger ones, are in stable orbits. This is fun! And it references some of the asteroids we've seen in FTZ. Size of asteroids compared to New York City (https://laughingsquid.com/size-of-asteroids-compared-to-new-york-city/). And in The Expanse! Definitely interesting how this illustrates the transition point between amorphous bodies of material and gravity-rounded planetoids. Title: Re: The Size of Asteroids Post by: macavity on February 26, 2020, 09:08:43 am Also terrifying. Nah, Jupiter's got our back. (https://www.reddit.com/r/educationalgifs/comments/f8ious/this_is_how_jupiters_gravity_protects_earth_from/) It's let us down a few times in the past, but all of the ones in this video, especially the larger ones, are in stable orbits. Unfortunately if something is coming at you at over 10km/sec it doesn't need to be that big to have a lot of energy and do a lot of damage.... Title: Re: The Size of Asteroids Post by: Geo on February 26, 2020, 09:41:51 am Also terrifying. Nah, Jupiter's got our back. (https://www.reddit.com/r/educationalgifs/comments/f8ious/this_is_how_jupiters_gravity_protects_earth_from/) It's let us down a few times in the past, but all of the ones in this video, especially the larger ones, are in stable orbits. Unfortunately if something is coming at you at over 10km/sec it doesn't need to be that big to have a lot of energy and do a lot of damage.... Come on now. The Gamalons were lobbing big, high speed asteroids at us and we only needed to worry about the radiation. But the Earth will survive! Title: Re: The Size of Asteroids Post by: lifmcs on February 26, 2020, 12:17:05 pm Yes, quite. Earth certainly will.
Title: Re: The Size of Asteroids Post by: mns_95125 on February 26, 2020, 01:49:10 pm For those who read the Expanse novels, and know what happens in the story behind the point included in the TV show, this asteroid discussion takes on a new significance.
Title: Re: The Size of Asteroids Post by: macavity on February 26, 2020, 03:33:14 pm Come on now. The Gamalons were lobbing big, high speed asteroids at us and we only needed to worry about the radiation. But the Earth will survive! Actually, radiation is about the only thing you don't have to worry about... I recollect that, at the time of the Halle comet encounter one of my colleagues was of the opinion that if it impacted it would produce an enormous crater and demolish a few square miles. and I thought that was a bit of an underestimate. When we did the maths it turned out that the resultant kinetic energy was the equivalent of giving every man woman and child on the planet a small atomic bomb and asking them to explode them simultaneously.... (of course, comets are 10s of km in size and fall in from athe edges of the solar system so can have closing velocities of up to 60km/sec). And you wouidn't have to worry about global warming either - the resultant fimbulwinter would take care of that for decades.... Title: Re: The Size of Asteroids Post by: lifmcs on February 26, 2020, 03:56:15 pm The Lady Astronaut novels have their alt-history plot set off by an asteroid landing near the coast of Delaware. It obliterates a good chunk of the eastern seaboard and triggers a nuclear winter from all the ejecta, but long term is a more serious threat to humanity via global warming caused by the constant evaporation of seawater over the cooling impact site saturating the atmosphere with water vapor.
|