Hypotheticly yes, but you would need something very big to block the light or reduce it. Planet sized for example, this is one way we detect planets around other stars, by measuring how much the light dims.
Another potential problem is that (at leas according to this wikipedia article https://en.wikipedia.org/wiki/List_of_nearest_galaxies) the closest galaxy is around 33000 light years away. So any signal we send will take 33000 years to get there and any potential return would take the same amount of time, so 66000 years in total. That is far longer than any human civilization exists
First part, wouldnt that only depend on the amount of light that you need to block for them to detect and couldn’t you place the shutter further away to reduce its size?
Also, name a faster way to transmit data intergalaxtically
Edit: also, since we are already transmitting light couldn’t we just send images. If life such as us is who we want to reach wouldnt it only make sense to design for our own light receptors?
I am willing enter the dumbass territory here, but - raido waves, being electromagnetic, and light travel at the same speed. Even if there is technically a difference, it is probably insignifact for the amount of distance each would have to cover before it can effectively transmit anything.
The convenience of a radio signal is that the transmitter is much easier to point in different directions, primarily because it’s a lot smaller than a star, but also because it can (at least in theory) be pointed in directions normally blocked by other celestial bodies. Given the position and orbital physics of a solar system, it would insanely difficult to position something directly “above” or “below” the Sun, let alone something as big and technologically advanced to block enough light, at an adequate frequency, to transmit any data. While a radio transmitter can be launched into space and positioned sufficiently far from other objects in the solar system to send data into various points of space. There can even be multiple such satellites, for all sorts of directions, coupled with repeaters and everything, while we only have one star in the system.
Of course, radio also depends on the receivers, even regardless of the data transmitted, but I believe in aliens, they’ll figure something out.
Hypotheticly yes, but you would need something very big to block the light or reduce it. Planet sized for example, this is one way we detect planets around other stars, by measuring how much the light dims.
Another potential problem is that (at leas according to this wikipedia article https://en.wikipedia.org/wiki/List_of_nearest_galaxies) the closest galaxy is around 33000 light years away. So any signal we send will take 33000 years to get there and any potential return would take the same amount of time, so 66000 years in total. That is far longer than any human civilization exists
First part, wouldnt that only depend on the amount of light that you need to block for them to detect and couldn’t you place the shutter further away to reduce its size?
Also, name a faster way to transmit data intergalaxtically
Edit: also, since we are already transmitting light couldn’t we just send images. If life such as us is who we want to reach wouldnt it only make sense to design for our own light receptors?
I am willing enter the dumbass territory here, but - raido waves, being electromagnetic, and light travel at the same speed. Even if there is technically a difference, it is probably insignifact for the amount of distance each would have to cover before it can effectively transmit anything.
The convenience of a radio signal is that the transmitter is much easier to point in different directions, primarily because it’s a lot smaller than a star, but also because it can (at least in theory) be pointed in directions normally blocked by other celestial bodies. Given the position and orbital physics of a solar system, it would insanely difficult to position something directly “above” or “below” the Sun, let alone something as big and technologically advanced to block enough light, at an adequate frequency, to transmit any data. While a radio transmitter can be launched into space and positioned sufficiently far from other objects in the solar system to send data into various points of space. There can even be multiple such satellites, for all sorts of directions, coupled with repeaters and everything, while we only have one star in the system.
Of course, radio also depends on the receivers, even regardless of the data transmitted, but I believe in aliens, they’ll figure something out.