Ancient Echo from Sgr A* // Lightning on Jupiter // TRAPPIST-1c by James Webb
JWST Looks at the Next Planet in the TRAPPIST system. Could we detect colliding supermassive black holes. Hot Jupiters that flew too close to their stars.
Watch the video here (with no ads) or on YouTube: https://youtu.be/5jw_cHqT8QU
Ancient Echo from Sgr A* // Lightning on Jupiter // TRAPPIST-1c by James Webb (Vimeo)
Comments (6)
Hi, A question. As best I understand it there is a lot more dark matter than "normal matter" and it is needed to hold galaxy's together. Our local galaxy(the milky way) must have lots of dark matter too. My question is where is it located?? Near the center? or out past the satellite galaxies like the Magellanic clouds? Or is my question based on incorrect premises ?
We don't know. But it seems to be in a giant diffuse halo that surrounds the entire Milky Way in all directions, several times larger than the galaxy itself.
22:33 "You can see that a lot of carbon dioxide is released from North America." Perhaps this statement should include other countries north of the equator, such as Europe, Russia, and China. Based on this one-sided (lieterally) picture, I think it would be better to say, "...released in the Northern Hemisphere."
The data was taken from all around the world, and the atmosphere can be seen to mix across lines of longitude, so the carbon dioxide distribution would be the same in the eastern hemisphere. It is not necessarily being released only from North America.
8:40 "Not to mention from all of the other *constellations*?"
An order of magnitude is about a 2.5 change in brightness; it's based on the difference between first and sixth magnitudes (historically bright stars and those just visible to the naked eye) being one hundred. 100 ^ 1/(6-1) =~ 2.512 So to go from 16 to 9 is a brightening of 2.512 ^ (16-9) = 631 times or a lot!