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This. I find it all confusing. Article A: Here’s a photo of a another galaxy so far away, showing XYZ. Article B: We suspect there’s another planet in our own
by paulstovell 7y ago
This. I find it all confusing.
Article A: Here’s a photo of a another galaxy so far away, showing XYZ.
Article B: We suspect there’s another planet in our own solar system but we can’t find it and supposedly it’s too far away for us to photograph it.
- SiempreViernes 7y agoSurely there is nothing too strange about this? A light house can be seen from very far away, but you need not drop your keys very far away in a parking lot before they become impossible to find.
- caf 7y agoSeveral galaxies have angular diameters when viewed from Earth of more than 1 degree. The Large Magellanic Cloud is 11 degrees! None of the planets in our solar system are anywhere near this big in the sky - the Moon is only half a degree. Getting a brighter picture of something that's dim just requires collecting more light - essentially taking a longer exposure. But getting a sharper picture of something that's very small in the sky is limited by both the aperture of the telescope (the diffraction limit) and the atmospheric distortion, if you're viewing from the ground.