Estimates indicate that the number of galaxies in the observable universe is comparable to the number of stars in the Milky Way, with projections suggesting around 150 billion galaxies and 200 to 400 billion stars in our galaxy. Current evidence supports the idea that there are likely more galaxies than stars, as advancements in telescope technology will allow for deeper observations. The Hubble Ultra Deep Field (HUDF) has provided significant data, but future telescopes are expected to reveal even more galaxies. As observational capabilities improve, the count of observable galaxies will continue to rise, while the number of stars in the Milky Way remains relatively fixed. Overall, the consensus leans towards there being more galaxies in the observable universe than stars in the Milky Way.
#1
Loren Booda
3,108
4
Do you think there are more stars in our Milky Way galaxy, or galaxies in the observable universe?
I don't know that this really needs to be a poll - we have good evidence for the number of observable galaxies: the Hubble UDF. By extrapolation, if we repeated the HUDF and covered the entire sky, we'd see about 150 billion galaxies. It is believed that the Milky Way contains sonewhere in the neighborhood 200 to 400 billion stars.
So we're not there yet, but it wouldn't surprise me at all if we can peek just a little deeper and get a whole lot more.
#4
DaveC426913
Gold Member
23,899
7,939
I think that the two being within the same order of magnitude would constitute 'too close to tell'.
#5
MadScientist 1000
96
0
More galaxies in the observable universe. Why?
As time progresses, we will be able to see more light from the furthest galaxies, numbering in the billions, and steadily increasing, compared to the number of stars in the Milky Way, which are decreasing.
#6
Nexus555
58
0
While Hubble did do an excellent job, I still think there are more galaxies in the observable universe than stars in our galaxy. There will be greater telescopes in the future, which will look even deeper into the cosmos.
Partial solar eclipse from Twizel, South Isl., New Zealand ...
almost missed it due to cloud, didnt see max at 0710 NZST as it went back into cloud.
20250922, 0701NZST
Canon 6D II 70-200mm @200mm,
F4, 100th sec, 1600ISO
Makeshift solar filter made out of solar eclipse sunglasses
Is a homemade radio telescope realistic?
There seems to be a confluence of multiple technologies that makes the situation better than when I was a wee lad: software-defined radio (SDR), the easy availability of satellite dishes, surveillance drives, and fast CPUs.
Let's take a step back - it is trivial to see the sun in radio. An old analog TV, a set of "rabbit ears" antenna, and you're good to go. Point the antenna at the sun (i.e. the ears are perpendicular to it) and there is...
This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed).
n.b. I start this...