Spaceception

So 55 Cancri e/Janssen was recently found to have an atmosphere of H2 and He (http://www.apextribune.com/tag/55-canri-e/) and a temperature of 1999 c, the planet has a mass of 8.3 Earths and a radii of 2 Earths, it's 40 ly away, and I was wondering when you guys think we'll detect the atmosphere of an Earth-like exoplanet.

I think this counts as politics.

Oh, I know about that one, I thought you were talking about a different one.

Really!? Why aren't we funding the $#!t out of this!?

Near term: Nuclear thermal rockets fueled by liquid Ammonia, Long term, VASIMR.

Does it really matter?

1.09 and .92 Earth radii

Ooooh, this thread is gonna be fun; The Rook breaks out 2 AK-47s and begins shooting at the opposing queen.

I'm a teenager, so I have none, but I'd like to be a Aerospace engineer

Banned for being only 97% Kerbal.

What do you guys think? Two planets, Earth 2 is 1.2x the mass of Earth 5-6 c warmer than Earth and is mostly land, with one small ocean, has a 64 hour day/night cycle, and a 12 day orbit, planet c is .9x the mass of Earth, (I don't know what to call it) is 35 c colder than Earth, and and an atmosphere about as thin as Earths, with a 30 something day orbit.

Also, under some conditions, you could probably expose the plants to sunlight (With a clear covering to keep in the atm/temp of course) due to there being (Weak, mind you) Spotty magnetic fields around Mars.

Watch:

Well, I'm thinking it would have a specific impulse of 70,000-100,000 seconds, so pretty efficient I guess.

When did I say you had to have a subsurface colony? Mars has much more water, its day/night cycle is better for growing food (Yes, I know Mars gets less light than Earth, but that's not too much of a problem), its gravity is more than double the Moons (Which is better for long-term health, the Moons gravity might be fine for humans with regular exercise, but Mars' gravity is better overall) it has an atmosphere to protect Astronauts from micrometeorites, and we may be able to Terraform it someday to turn Mars into a second Earth. You got me there. Until we have faster propulsion technologies

So? The point is we can build spacecraft that can last for decades, it still has power, right? It can still use some of its instruments, right? If we put work into it, we could double, triple or even quadruple its lifespan using an actual nuclear reactor.

All you need is at least 3 meters of stuff; metal, water, poop, dirt, the fuel tank/engine, whatever, between you and the radiation, so when we're on Mars, all you need to have is a inflatable module with 3 meters of martian dirt between the two hulls, and 'voila! No radiation!

We already have a few of these threads.

Crash course physics is coming, and it's hosted by a Brit!

Plus, I helped create one of the planets i.e. I provided the description, and the modmaker made it.

Dumb meme

We've fond evidence of a earth-sized planet around Star b, and no, not the one that was found in 2011; That one probably doesn't exist, this one was found in 2013 I think. No, it was designed to slow down.

Project Longshot Was US Navel academy/NASA project that ran from 1987-88 and proposed launching a unmanned starship to Alpha Centauri b at ~5% light speed, the trip would've taken 100 years. The probe would've been built at the proposed space station freedom and used closed long lived fission reactor for power with a fusion engine similar to the one Daedalus would've used, the ship weighed 396 metric tons. So what do think of it? And what do you think would've happened to society and spaceflight if we built/launched it?

Granted, but you die of dehydration.

Okay, sorry everyone who's helping me with the propulsion system, I know I switched it around, but this time it's a Medusa sail for sure, as stated in the edited OP, I need to get to 8% the speed of light (And slow down) to Barnard's Star, 5,9 ly away on a manned ship with 250 people total (I know 10,000 should be the minimum for a genetically diverse colony, but studies in the past said 100 people should be just fine, so I'm sticking to those older ones) the trip time is about 70 years. It will use low-medium yield bombs similar to the one that went to Hiroshima (Only retrofitted for the Medusa) that will go off every three seconds. And yes, the original system was Wolf 359, but Barnard's Star is 2.1 ly closer, so that shortens the trip time by more than a decade. Also, when I begin writing, I'll post the first 2-3 chapters here. EDIT: Hmmm, maybe @RoverDude could help?