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Astronomers Spot First-Known Interstellar Comet
- diggernet 9y ago"Based on its apparent brightness, dynamicist Bill Gray calculates that it would have a diameter of about 160 meters (525 feet) if it were a rock with a surface reflectivity of 10%." It is, of course, almost certainly a rock. But as a pointless mental exercise, how large would it be if it were a shiny metal probe?
- softrock 9y agoThe observations are still coming in and things are very uncertain. One astronomer on twitter noted that if the most uncertain measurement were removed that the comet has a 0.9 eccentricity, and therefore likely not an interstellar comet.