Here's my take...

The Earth is not in orbit, but everything else in the solar system is.

We understand almost nothing about true gravity.

It's likely the Earth is a created "biosphere" and not a true planet.

The moon is not natural either, and its own issues cause the star anomaly.

Seasons are caused by electromagnetic affects due to the tilt of the Earth and the Sun's main affect is not from heat rays on their own but the electromagnetic phenomena. The tilt is from gravitational solar system effects and not the orbit.

Much of the heat comes from the core of the Earth and the combination of the core with the atmosphere and trapped solar energy is extra.

Light bends.

Space is not a true vacuum just absent of atmosphere.

We don't know what's at the center of the Earth, but it's likely something we have no idea about yet or related to dark matter which we have little idea about.

Not that scary, just *different*. The universe is multidimensional, and who knows how much this affects our daily 3-D life :)