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Seven earth-sized planets discovered circling a star 39 light years from Earth

nature.com

261–270 of 754 posts

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#261

Earlier quoted context omitted.

That's essentially what blueprint said. You didn't have any trouble figuring out what blueprint was saying, right?

What's wrong with begs the question? It's a regular part of my vocabulary and I'm a southern American.

[deleted]

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#262

Earlier quoted context omitted.

That's essentially what blueprint said. You didn't have any trouble figuring out what blueprint was saying, right?

What's wrong with begs the question? It's a regular part of my vocabulary and I'm a southern American.

[deleted]

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#263

Earlier quoted context omitted.

That actually sounds... more plausible than I would have expected. Like, doable with technology I can imagine being within reach in the next 50 years even if we don't achieve any currently-unforseen breakthroughs.

Is it plausible for anything we'd build to travel .998c and survive the journey?

Not a physicist, but wouldn't a spacecraft standing on Earth's surface already feel 1g because of Earth's gravity (https://en.wikipedia.org/wiki/Equivalence_principle)?

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#264

Earlier quoted context omitted.

Optically? That's nuts! Anyone know how this would work? Can we really expect Webb to measure light diffraction/refraction through a few miles of atmosphere on a planet 40 ly away?

It'll be in the near-infrared, but the light won't be separated from the star. How they observe the atmosphere is that when the exoplanets transit, they block out different amounts of light at different wavelengths. From that, one can deduce an atmospheric spectrum.

Would using a shield to block out the star be good enough to image the planets?

https://en.m.wikipedia.org/wiki/New_Worlds_Mission

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#265

Earlier quoted context omitted.

I was essentially thinking the same thing. I wonder if an elevator could be built between all of them?

One of the callers (a biologist, so not a crackpot) on TV suggested that given how close the planets were, he wondered if it were possible for there to be cross contamination between the planets given how close they are to each other. He referred to them being part of the same "ecosystem." I'm not sure how feasible that is as a non-astrobiologist, but it is an interesting idea.

One of the presenters is an old friend from college. Folks were offering him money to mention "Zod, our Galactic Overlord" on the air. I guess that didn't happen?

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#266

Earlier quoted context omitted.

Is it plausible for anything we'd build to travel .998c and survive the journey?

Just going that fast isn't really risky at all (assuming you don't hit anything, which isn't actually a safe assumption). The tough part is making something capable of a constant 1g of acceleration for a 7 year trip. Most of the craft we make only accelerate for the first small percent of a trip. We can do accelerations that high, but not for very long, and we can't even manage acceleration for such a long duration e…

You have no idea how scary traveling at near-lightspeed actually is. Isaac Arthur has a great video covering it. https://www.youtube.com/watch?v=s6BQSgidbmc

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#267

Earlier quoted context omitted.

Is it plausible for anything we'd build to travel .998c and survive the journey?

Just going that fast isn't really risky at all (assuming you don't hit anything, which isn't actually a safe assumption). The tough part is making something capable of a constant 1g of acceleration for a 7 year trip. Most of the craft we make only accelerate for the first small percent of a trip. We can do accelerations that high, but not for very long, and we can't even manage acceleration for such a long duration e…

You have no idea how scary traveling at near-lightspeed actually is. Isaac Arthur has a great video covering it. https://www.youtube.com/watch?v=s6BQSgidbmc

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#268
post #188

Earlier quoted context omitted.

It doesn't work in Microsoft Edge either (yup I use it).

Is this taboo? I also use Edge and find it great.

I don't see many people using Edge. I mostly don't have any problems now that it has extensions for ad block and lastpass. Sometimes opening a new tab just mysteriously doesn't work (it sits with the tab open doing nothing) or the website barely works without Edge freezing up (CarMax.com).

The battery life is really good though.

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#269
post #253

So, are there any plans to try to "communicate" with this planets? Or we are going to just sit and watch.

Well, we could send a message and then wait 80 years for a reply. So we might want to work on immortality first.

Re: Seven earth-sized planets discovered circling a star 39 light years from Earth

#270

Earlier quoted context omitted.

That's essentially what blueprint said. You didn't have any trouble figuring out what blueprint was saying, right?

What's wrong with begs the question? It's a regular part of my vocabulary and I'm a southern American.

'begging the question' is the name of a specific logical fallacy and is not grammatically correct. You could say 'begs for the question' or as the parent comment suggests...
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