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originally posted by: Cobaltic1978
There always seem to be UFO sightings at historical events, so maybe they are time travellers observing these events?
originally posted by: Cobaltic1978
There always seem to be UFO sightings at historical events, so maybe they are time travellers observing these events? Of course, there are usually explanations for these sightings, so unless they actually make contact, then it's pure speculation.
However, over the entire main sequence lifetime of the Sun (about 10 billion years), the Sun will only lose about 0.1% of its mass, which means that the Earth should move out by just ~150,000 km (small compared to the total Earth-Sun distance of ~150,000,000 km).