How Far Are The Nearest Stars?
Cody'sLab3 HN recommenders · 2019–2025
3.7M views · explainer · evergreen · Uploaded 2017-06-20
Cody's Lab builds a 200-billionth-scale model to show how far away the nearest stars are, using parallax and light speed. A short astronomy explainer on interstellar distances.
Recommended whenever threads need an intuition for the vast distances between stars.
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6 comments from Hacker News
Anyone who thinks we'll ever travel to another solar system really truly fails to understand the distances involved. The furthest humanity has ever travelled, by way of analogy, is a couple of millimeters - to the moon. The nearest star system relatively speaking is another 200 kilometers further. And sure you can appeal to the "well you never know what humans are capable of in the future" line of thinking, but that's really just star trek fantasy - there's not the remotest chance, nada, never. Here's a fun video that explains and will totally dismiss any idea that we'll ever get there - apart from Star Trek fantasy: [VIDEO]
The stars will pass BY each other. The galaxies will pass THROUGH each other without collisions. There are many youtube videos that try to visualize the incomprehensible scale of space. Here is one just for our solar system [VIDEO]
Cody put a few solar system objects on a stadium, with distances to scale, the sun is represented by a pea. He then proceeds to drive cross country to put on the closest stars. [VIDEO]
I believe in aliens from a statistical standpoint. But I don't believe in interstellar travel at all. I don't think people grasp the distances between stars. The longest distance a human has traveled through space is to the moon. If, for scale, this was about 2 millimeters, then the nearest star would be another 200 kilometers/124 miles away. Here's a great video to illustrate [VIDEO] IMO Oumuamua was a rock.
There's no aliens anywhere near earth. There really aren't. Given the staggering, likely impossible task of traveling between the stars, it's essentially impossible that they'd turn up on a planet with this many people and be so in tune with our technology and media that they manage to stay out of sight entirely, except for some government secret Area 53 base or whatever. If you think that traveling between the stars is even remotely practical then maybe watch this video that illustrates the distance only to the closest star, let alone any further away: [VIDEO]
My favorite: Cody'sLab's "How far away are the nearest stars": [VIDEO] Also gives an intuition for how incredibly bright stars shine