From NASA:
"In gamma-ray astronomy, "particle-particle collision" usually means a high-energy proton, or cosmic ray, strikes another proton or atomic nucleus. This collision produces, among other things, one or more neutral pi mesons (or pions). These are unstable particles that decay into a...
Supposed to represent a relativistic proton colliding with a stationary proton, leading to changes in the momentum of both and the production of a neutral pion. The pion then decays into two photons.
No clue if this is right. I've never drawn anything much more complicated than...
So I have seen time dilation written as all three of the following: t=τγ, Δt=Δτγ, dt=dτγ. I'm assuming this not to be the case, but just wanted to clarify that the third (differential) notation does not imply that t=∫τγ? That really wouldn't make sense (to me at least), so I'm assuming that...
Yes, this. I've actually done it before with radio telescopes. My team collected Doppler shifts from neutral hydrogen clouds from a section of the galactic plane, calculated distances and orbital speeds, and plotted those. Fascinating stuff.
Not really. All I really need clarification on is if the order is correct. Those are the only major events possible to include and the example specimens are definitely correct for each step. So just whether the order is right, which I suspect it is.
I'm trying to create a chronological timeline of the formation of solids in the solar system with examples of meteorites for each step. Let me know if this order looks right.
First solids condense in the solar nebula (Calcium aluminum inclusions in carbonaceous chrondrites).
Chondrules rapidly...
Thanks all. I mostly understand now. Just one more question now. So as I understand (or at least think I do), if the space between us and a galaxy is expanding faster than c, those photons will never be able to reach us and the galaxy will effectively "wink out" and disappear. And space expands...
So the space where the CMB was emitted is further back in time but closer in space than these old, distant galaxies since the universe was much smaller back then, which makes the CMB visible to us know?
Since the observable universe is expanding, over time, more galaxies should become visible on Earth as their light has had more time to reach us. But galaxies couldn't form until after recombination. So why is the CMB visible if light sources younger than it are not visible yet?
I know. So after we talk again, if they have an issue with anything, they will be listed as co authors. If not, I will more than happily list them in acknowledgments.
The fact that besides helping with manual tasks (data collection), one of the people really did nothing but cause the team setbacks due to stubbornness, rudeness, etc.
I definitely agree. But by not successful, I really meant causing friction in the team. But anyways, I digress. I shall see exactly how the others feel and hopefully it will work out well.