Showing posts with label Observable. Show all posts
Showing posts with label Observable. Show all posts

Friday, August 8, 2025

The Largest Known Structure In The Observable Universe

 Quipu, the largest known structure in the observable universe, is a colossal cosmic web spanning approximately 1.3 billion light-years.

Discovered through advanced astronomical surveys, it comprises an intricate network of galaxies, galaxy clusters, and intergalactic gas bound by gravity.

This megastructure, named after the Incan knotted-string system, contains an estimated 200 quadrillion (2×10^17) solar masses, dwarfing typical galaxy clusters.

Its immense scale challenges our understanding of cosmic structure formation, as it pushes the limits of homogeneity predicted by the cosmological principle, which assumes the universe is uniform on the largest scales.

Quipu’s vastness is shaped by dark matter, forming a scaffolding that draws baryonic matter into filaments, walls, and voids.

These structures channel galaxies into dense regions, with Quipu’s mass dominated by dark matter and hot gas, alongside millions of galaxies.

Its discovery, likely aided by tools like the Sloan Digital Sky Survey or future observatories like the Vera C. Rubin Observatory, underscores the universe’s hierarchical organization.

Studying Quipu helps astronomers probe dark energy’s role in cosmic expansion and refine models of large-scale structure formation, revealing the universe’s complexity over unimaginable distances.

#Quipu

Thursday, April 17, 2025

The observable universe

 The observable universe is vast and mind-bogglingly large. The most distant galaxies we can observe are so far away that the light we see from them today actually started its journey towards us billions of years ago. This means that when we look at these galaxies, we are essentially looking back in time. The observable universe is estimated to be about 93 billion light-years in diameter, even though the age of the universe is only about 13.8 billion years. This apparent discrepancy is due to the fact that the universe has been expanding over time, causing the distances between galaxies to increase.The scale of the universe is so immense that it challenges our understanding of space and time. It's a reminder of the incredible mysteries that still exist beyond our cosmic neighborhood.

Tuesday, April 8, 2025

What are the images that make you rethink your existence?

 1. This is Earth. You and I live here.

2. And here is where we are exactly in our neighborhood, the Solar System

3. This is the distance, to scale, between the Earth and the Moon. Doesn't look like much, right?

4. It’s not quite like that. All the planets in the Solar System fit between the Earth and the Moon…

The average distance between the Earth and the Moon is 384,400 km. This would fit all the planets and still have about 8,030 km left over.

5. …so let’s talk about planets. This green blob is North America on Jupiter.

North America compared to Jupiter.

6. And here is the size of Earth (or rather, six times Earth) compared to Saturn

7. To illustrate this better, look at how Saturn's rings would look if they were on Earth.

From Ecuador, Polynesia, Alaska and Washington.

8. Here's a comet. Recently, man landed a probe on one of these. Just look at the size comparison between a comet and Los Angeles:

I think you can imagine the damage if one of these collided with the planet, right?

9. But nothing compares to our Sun. Look:

You are here.

10. This is the view from the Moon:

11. And here's the view from Mars:

12. And this is what Earth looks like from Saturn's rings:

13. Now see how our home looks from Neptune – 6,437,376,000 km away

To paraphrase Carl Sagan, everyone and everything you know exists on this tiny dot.

14. But let's get back to the Sun. Here's a comparison of its size compared to Earth. Scary, right?

That's right. The Sun doesn't even fit in the image.

15. See the Sun from the surface of Mars:

16. This is nothing. To quote Carl Sagan again, there are more stars in space than there are grains of sand on all the beaches on Earth.

17. Do you know what this means? There are stars much, much bigger than our beloved Sun. Just look at how insignificant it can seem:

18. Here's another perspective. The largest star, VY Canis Majoris, is 1 billion times larger than the Sun.

19. But none of this compares to the size of a galaxy. Get this: if we reduced the Sun to the size of a white blood cell and reduced the Milky Way to the same scale, the size of the Milky Way would be equivalent to the size of the United States.

What madness!

20. Of course this is because the Milky Way is huge. Here's where we are:

21. And this is all you can see in the sky:

All the stars you see at night are inside this yellow circle.

22. If you haven't been impressed yet, now your head WILL explode. Look at the size of the Milky Way compared to other galaxies:

IC 1011 is 350 million light years away from Earth. Just imagine all that could exist in this space. Seriously, it's scary.

23. YES, you can think bigger. Just in this photo taken by the Hubble telescope there are thousands of galaxies, each containing millions of stars and some planets.

24. This is UDF 423, one of the largest galaxies ever photographed. It's 10 BILLION light years away.

Looking at this image is like looking back billions of years. o______O

25. This is a picture of a small part of the universe. An insignificant part of the starry sky.

26. Oh, and there's more! It's safe to say that there are black holes out there. Here's a comparison of the size of a black hole to Earth (just to scare you):

Black hole NGC 1277 > Orbit of Neptune > Orbit of Earth.

So if you're upset because your team lost again, or because your favorite soap opera isn't going the way you'd like: just remember...

27. This is our home.

28. This is what happens when we take a broader view of our neighborhood, the Solar System

In red is Earth.

29. This is what happens when we have an EVEN WIDER vision…

In red is the Solar System.

30. …YET MORE…

The Milky Way.

31. …CONTINUE…

In red is the Milky Way along with other galaxies.

32. …LET’S GO FURTHER…

I don't even know what this means anymore, but that entire group of galaxies from the previous image is in the little red dot in the image above.

33. …HOW FAR WILL THIS GO?

34. There you have it. There you have it, the entire observable universe and your place in it. Just a tiny ant in a giant jar.

All above is just observable universe.