Editing Talk:2125: Luna 2
Please sign your posts with ~~~~ |
Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.
The edit can be undone.
Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision | Your text | ||
Line 51: | Line 51: | ||
:That impact speed still sounds ridiculously high, Escape velocity to break free of earth orbit is, IIRC, 11.186 km/s (roughly 40K kmph or 25K mph), and it takes a massive rocket to achieve that. Most of a trans-lunar flight is unpowered using either momentum built up by the initial launch thrust or the gravitational pull of the moon itself. I find it hard to believe that impact speed, even allowing for gravitation influence of the moon itself, could result in an impact at almost 2X the speed needed to get away from Earth in the first place.[[User:RAGBRAIvet|RAGBRAIvet]] ([[User talk:RAGBRAIvet|talk]]) 07:24, 19 March 2019 (UTC) | :That impact speed still sounds ridiculously high, Escape velocity to break free of earth orbit is, IIRC, 11.186 km/s (roughly 40K kmph or 25K mph), and it takes a massive rocket to achieve that. Most of a trans-lunar flight is unpowered using either momentum built up by the initial launch thrust or the gravitational pull of the moon itself. I find it hard to believe that impact speed, even allowing for gravitation influence of the moon itself, could result in an impact at almost 2X the speed needed to get away from Earth in the first place.[[User:RAGBRAIvet|RAGBRAIvet]] ([[User talk:RAGBRAIvet|talk]]) 07:24, 19 March 2019 (UTC) | ||
::22 km/s seems to be wrong. Wikipedia along with a few quick google searches put the impact speed at around 3 - 3.3 km/s. To me (far from an expert) that appears more realistic but still fast enough to cause significant damage. Whether things are literally vaporized at those speeds I leave for others to determine.[[Special:Contributions/162.158.94.2|162.158.94.2]] 11:31, 19 March 2019 (UTC) | ::22 km/s seems to be wrong. Wikipedia along with a few quick google searches put the impact speed at around 3 - 3.3 km/s. To me (far from an expert) that appears more realistic but still fast enough to cause significant damage. Whether things are literally vaporized at those speeds I leave for others to determine.[[Special:Contributions/162.158.94.2|162.158.94.2]] 11:31, 19 March 2019 (UTC) | ||
− | |||
− | |||
− | |||
− | |||
== navigation buttons == | == navigation buttons == |