lichess.org
Donate

Finally, detailed analysis of Trappist-1 planetary system

The yt channel, astrum, has a new video with interesting information about the 7 planets of this red dwarf star.

The results are from scientists that studied JWST data about Trappist-1 the past few years.

The yt channel, astrum, has a new video with interesting information about the 7 planets of this red dwarf star. The results are from scientists that studied JWST data about Trappist-1 the past few years.

i wonder how do they find planets that emit nothing and weigh nothing and are placed dozens of light years from us. and yet they have not found any alien.

i wonder how do they find planets that emit nothing and weigh nothing and are placed dozens of light years from us. and yet they have not found any alien.

@steel-apron said ^

i wonder how do they find planets that emit nothing and weigh nothing and are placed dozens of light years from us.

There are several methods for detecting exo-planets. For example, if the planet has an orbit that makes it go through between its mother star and us we can measure the slight reduction of the starlight.
A heavier planet that is close to its star will cause the star to slightly wobble due to its gravity. (Technically the planet is not orbiting its star but both the star and the planet are orbiting their common center of gravity.) We can measure that wobble through the starlight's cycle of redshift and blueshift.

Of course these methods have to be applied for some time in order to find out if these starlight's changes are random or if they are cyclic and could therefore be caused by a planet.

and yet they have not found any alien.

Maybe that's because we haven't been visited by one.

@steel-apron said [^](/forum/redirect/post/lr3Y6FqE) > i wonder how do they find planets that emit nothing and weigh nothing and are placed dozens of light years from us. There are several methods for detecting exo-planets. For example, if the planet has an orbit that makes it go through between its mother star and us we can measure the slight reduction of the starlight. A heavier planet that is close to its star will cause the star to slightly wobble due to its gravity. (Technically the planet is not orbiting its star but both the star and the planet are orbiting their common center of gravity.) We can measure that wobble through the starlight's cycle of redshift and blueshift. Of course these methods have to be applied for some time in order to find out if these starlight's changes are random or if they are cyclic and could therefore be caused by a planet. > and yet they have not found any alien. Maybe that's because we haven't been visited by one.

@Katzenschinken said ^

i wonder how do they find planets that emit nothing and weigh nothing and are placed dozens of light years from us.

There are several methods for detecting exo-planets...

it is all correct, but among 10 asked randoms, who gather and translate these facts there is no more than one who can definitely say why any trajectory in a central gravitational field is always planar.

@Katzenschinken said [^](/forum/redirect/post/4OdpVhuB) > > i wonder how do they find planets that emit nothing and weigh nothing and are placed dozens of light years from us. > > There are several methods for detecting exo-planets... it is all correct, but among 10 asked randoms, who gather and translate these facts there is no more than one who can definitely say why any trajectory in a central gravitational field is always planar.

@steel-apron said ^

it is all correct, but among 10 asked randoms, who gather and translate these facts there is no more than one who can definitely say why any trajectory in a central gravitational field is always planar.

I don't understand what you mean. Orbits of planets are usually planar. If they are not then this must be caused by gravitational disturbance by a heavy object and most likely the planet won't stay in his orbit for much longer.

@steel-apron said [^](/forum/redirect/post/lgURNwvW) > it is all correct, but among 10 asked randoms, who gather and translate these facts there is no more than one who can definitely say why any trajectory in a central gravitational field is always planar. I don't understand what you mean. Orbits of planets are usually planar. If they are not then this must be caused by gravitational disturbance by a heavy object and most likely the planet won't stay in his orbit for much longer.

I just think planets are fascinating, have enjoyed studying them forever.

The seven worlds of Trappist-1 are all rocky planets comparable in size to Earth. The first planetary system discovered with so many small rocky planets.

I'll add later today the special capabilities of the JWST telescope that made it effective for these studies.

I just think planets are fascinating, have enjoyed studying them forever. The seven worlds of Trappist-1 are all rocky planets comparable in size to Earth. The first planetary system discovered with so many small rocky planets. I'll add later today the special capabilities of the JWST telescope that made it effective for these studies.

"they have not found any alien"

"they have not found any alien" * There have been extensive searches of radio waves with a pattern. None so far. https://www.seti.org/

Also, aliens are likely
much smaller than planets...

Also, aliens are likely much smaller than planets...

@what_game_is_this said ^

Also, aliens are likely
much smaller than planets...

And there is no guarantee that the potential "alien" is a life form at the stade of civilization, having the ability to make communications. It can be just some cells, or some creature at the equivalent evolutionary stade of our dinosaurs!

@what_game_is_this said [^](/forum/redirect/post/wPMS1gqL) > Also, aliens are likely > much smaller than planets... And there is no guarantee that the potential "alien" is a life form at the stade of civilization, having the ability to make communications. It can be just some cells, or some creature at the equivalent evolutionary stade of our dinosaurs!