posted on Jul, 15 2013 @ 09:38 AM
Originally posted by big_BHOY
Originally posted by wildespace
reply to post by theMediator
Sorry for off-topic, but another thing about UFOs that amazes me is how they avoid going through a fiery re-entry in our atmosphere.
Simply (not really that simple in technical terms), they slow down. If they don't dissipate their potential & kinetic energy when attempting re-entry
they will be going fast enough which is what will cause them to need a heat shield. If they slow-down using thrusters or whatever they would have at
their disposal, then they negate this problem & thus no fireball streaking across the sky.
Exactly. If you had enough fuel/long lasting power source to be able to slow down enough to cruise in through the atmosphere at relatively low speeds
(say a few hundred or a thousand mph or so), then there is no need for a heat shield. The reason spacecraft need a heat shield is that they are
hitting the atmosphere at 17,000 mph (25,000 mph for the Apollo capsules), causing massive amounts of friction.
If you could find a way to use thrusters to slow your fall toward Earth, then there would be far less friction and far less heat.
I'm not saying "that's how aliens do it"...I'm simply saying that's how it could be done -- alien or otherwise. The problem with us doing it is that
we don't have the capability to carry enough fuel to power the engines to slow us down enough all the way through the atmosphere.
edit on 7/15/2013 by Soylent Green Is People because: (no reason given)