3 ms·
Sun is moving cca 230 km/s around Sagittarius A*, so something even further from the center would have even higher speed if rotating at same speed (don't know i
by jajko 2y ago
Sun is moving cca 230 km/s around Sagittarius A*, so something even further from the center would have even higher speed if rotating at same speed (don't know if that's the trend in our galaxy, very much a tourist in astronomy)... doesn't sound that unusual unless its those 999km/s corner cases
- deciduously 2y agoExcept these stars are rotating the other direction
- ashes-of-sol 2y agoOrbital velocity increases as you get closer to the middle, not the other way around. An example closer to home, our orbital velocity around the Sun is 29.8km/s. Mercury is 47.9km/s (on average, it actually varies throughout its orbit). Neptune is 5.4km/s.
- shrimp_emoji 2y agoThis doesn't apply to stars in the Milky Way. Unlike planets around a star, stars in the Milky Way don't follow Keplerian physics in their orbit around the galactic center. https://en.wikipedia.org/wiki/Galaxy_rotation_curve https://en.wikipedia.org/wiki/Galaxy_rotation_curve ``` The rotational/orbital speeds of galaxies/stars do not follow the rules found in other orbital systems such as stars/planets and planets/moons that have most of their mass at the centre. Stars revolve around their galaxy's centre at equal or increasing speed over a large range of distances. In contrast, the orbital velocities of planets in planetary systems and moons orbiting planets decline with distance according to Kepler’s third law. ```