Do I understand this correctly and does this mean that objects like planets are expanding dimensionally? I'm sure that the size of material objects, even stars, is so small that it would be impossible to measure but over billions of years would there be a mearurable expansion in something the size of a planet?
You also need to factor in gravity. Yes, space is expanding everywhere, including the space within planets and stars. However, this expansion is very, very small for short distances. Over these short distances gravity is able to easily overwhelm the force of expansion. Keep in mind, this is for the current expansion rate.
If my understanding is correct, the expansion rate is accelerating. There might very well be a time in the future when the expansion rate is high enough to overcome the gravity within a planet. This is called the "Big Rip".
Edited by Taq, : No reason given.
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