The filthy aliens tried to invade, but we dealt with them and destroyed their satellite back in the early 60's. That was all back during the 1st space war, we did not even have a proper space force at the time, but we still showed those aliens. https://en.wikipedia.org/wiki/High-altitude_nuclear_explosionNot the Annunaki because they could have found larger deposits of gold on other planets. Mining gold is one of background stories of the Annunaki. Supposedly they came to Earth during human cave man days, educated humanity and then enslaved humanity to work the gold mines. A space faring race such as the Annunaki wouldn't simply have left Earth, they would taken all of the gold that they were able to extract. Even going to the lengths of building large refineries underground to harvest the gold from the liquid magma that flows to the surface and creates volcanoes. Those refineries would also have been able to produce mass quantities of other minerals and ores needed by a space faring civilization. Something else happened to drew the Annunaki away from Earth along with most of their advanced technology. Maybe they found a much larger and easier to mine planet of gold.
Joking aside, I wonder if anyone would want to contact us after seeing that. I was unaware of the amount of insanity we had allowed to occur. This is the same reason the Bikini Atoll is still uninhabitable. Although aliens would know it would be a waste time coming here for resources, so we do not have to worry about that. Asteroids can be mined much more efficiently than on a planet, if you intend on transporting materials through space to another location.