- cross-posted to:
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- ufos
- uap
- cross-posted to:
- [email protected]
- ufos
- uap
This week, the director of the U.S. government’s UFO analysis office stated that there is “evidence” of concerning unidentified flying object activity “in our backyard.” According to physicist Seán Kirkpatrick, who heads the congressionally-mandated All-domain Anomaly Resolution Office, this alarming UFO activity can be attributed to one of two extraordinary sources: either a foreign power or “aliens.”
To be sure, the ramifications of either would be significant. But Kirkpatrick’s comments, which come as he is about to retire after a 27-year defense and intelligence-focused career, are more intriguing because he also says that “none” of the hundreds of military UFO reports analyzed by his office recently “have been positively attributed to foreign activities.”
At the same time, Kirkpatrick and senior defense officials have ruled out the possibility that secret U.S. programs or experimental aircraft explain the phenomena.
Nuclear thermal engines still need propellent.
And while they have an ISP about 10 times higher than chemical rockets, they are still basically useless for interstellar distances.
Simply because the more you accelerate the more you have to break and you have to carry the propellant for both.
TLDR: the rocket equation is a merciless task master.
You don’t have to carry enough for both. You can solar sail and gravity break.
No you can’t.
Any craft that has enough mass for human travel and is accelerated to even 1% of c would need solar sails that are thousands of square Kms in area to have a hope of decelerating.
That still ends up at a 500+ year trip to Alpha Centauri.
And that is just more added weight you have to accelerate in the first place.
TLDR: the rocket equation is a merciless task master.
Ok show your math. Show that nuclear fueled rocket can never get above 5% light speed in total.
You first…