We live inside our universe and cannot get a bird's-eye view of it from outside. And we cannot even see all of our universe. Distant parts of it are expanding away from us so fast that they are invisible; they go faster than the speed of light. Having bigger telescopes to see fainter stars will not help us here: invisible is truly invisible.
Interpretation
We cannot fully comprehend our universe as we are limited by our perspective and the speed of light.
This quote highlights the inherent limitations of human perception and understanding when it comes to the universe. It suggests that there are vast regions of space that are beyond our ability to see or comprehend, as they are moving away from us faster than the speed of light. The notion of 'invisible' serves as a metaphor for the mysteries of the cosmos that remain beyond our reach, emphasizing the challenges of scientific inquiry and the limitations of our observational tools.
In practice
In a lecture on astrophysics, one might use this quote to illustrate the limitations of human observation.
There's some evidence that if you're recruiting, you tend to recruit a mini-me. Then you have a very comfortable group round a table. You all think alike. You agree. People are arguing that the banking crisis was because too many of the relevant bodies were thinkalikes, and that if they'd had more diversity, maybe it wouldn't have happened.
The universe is very big - there's about 100,000 million galaxies in the universe, so that means an awful lot of stars. And some of them, I'm pretty certain, will have planets where there was life, is life, or maybe will be life. I don't believe we're alone.
A search for truth seems to me to be full of pitfalls. We all have different understandings of what truth is, and we'll each believe - or we are in danger of each believing - that our truth is the one and only absolute truth, which is why I say it's full of pitfalls.
If you look at other countries, you'll find lots of girls doing physics, engineering, and science. It's something to do with the kind of culture we have in the English-speaking world about what's appropriate for each of the two sexes.
Arguably, my student status and perhaps my gender were also my downfall with respect to the Nobel Prize, which was awarded to Professor Antony Hewish and Professor Martin Ryle. At the time, science was still perceived as being carried out by distinguished men.
When I went to my local grammar school, Lurgan College, girls were not encouraged to study science. My parents hit the roof and, along with other parents, demanded a curriculum change.
The chance that higher life forms might have emerged through evolutionary processes is comparable with the chance that a tornado sweeping through a junk yard might assemble a Boeing 747 from the material therein.
The biogeographic evidence for evolution is now so powerful that I have never seen a creationist book, article, or lecture that has tried to refute it. Creationists simply pretend that the evidence doesn't exist.
If any human being earnestly desire to push on to new discoveries instead of just retaining and using the old; to win victories over Nature as a worker rather than over hostile critics as a disputant; to attain, in fact, clear and demonstrative knowlegde instead of attractive and probable theory; we invite him as a true son of Science to join our ranks.
Accurate and minute measurement seems to the non-scientific imagination, a less lofty and dignified work than looking for something new. But nearly all the grandest discoveries of science have been but the rewards of accurate measurement and patient long-continued labour in the minute sifting of numerical results.
Countless women are alive today because of ideas stimulated by a design flaw in the Hubble Space Telescope.
The most complex object in the known universe: brain, only uses 20 watts of power. It would require a nuclear power plant to energize a computer the size of a city block to mimic your brain, and your brain does it with just 20 watts. So if someone calls you a dim bulb, that's a compliment.
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