3 ms·
Microlensing events! (to be slightly more precise) https://en.wikipedia.org/wiki/Rogue_planet#Microlensing https://en.wikipedia.org/wiki/Rogue_planet#Microlens
by perihelions 3y ago
Microlensing events! (to be slightly more precise)
https://en.wikipedia.org/wiki/Rogue_planet#Microlensing https://en.wikipedia.org/wiki/Rogue_planet#Microlensing
- "They found 474 incidents of microlensing, ten of which were brief enough to be planets of around Jupiter's size with no associated star in the immediate vicinity. The researchers estimated from their observations that there are nearly two Jupiter-mass rogue planets for every star in the Milky Way.[26][27][28] One study suggested a much larger number, up to 100,000 times more rogue planets than stars in the Milky Way, though this study encompassed hypothetical objects much smaller than Jupiter.[29]"
- lamontcg 3y agoAnd "MACHOs": https://en.wikipedia.org/wiki/Massive_compact_halo_object https://en.wikipedia.org/wiki/Massive_compact_halo_object In the 1990s I went to a talk which suggested that "WIMPs" (Weakly Interacting Massive Particles aka supersymmetric particles that would give rise to dark matter) was an acronym for "Well It Might be Physics" while MACHOs was "Maybe Astrophysics Can Help Out". The upper bound on MACHOs has looong since eliminated them as the explanation for all of dark matter though...