The widely reported "hole in the Universe" is a lie
6 hours ago
- #astronomy
- #cosmic voids
- #misinformation
- The internet meme about a 'hole in the Universe' is scientifically inaccurate.
- The image often associated with the meme is actually Barnard 68, a dark nebula 500 light-years away.
- Barnard 68 is a small, nearby molecular cloud, not a cosmic void.
- Cosmic voids exist but are not empty; they contain matter, just at lower densities.
- Voids can be hundreds of millions to billions of light-years across but still have galaxies and gas.
- Detection of matter in voids relies on indirect methods like absorption lines and gravitational lensing.
- The integrated Sachs-Wolfe effect and weak gravitational lensing reveal the presence of dark matter in voids.
- Voids emit radiation, but it's often too faint for current telescopes to detect.
- Science aims to understand the Universe accurately, avoiding hyperbolic exaggerations.