Axios

President Trump's pitch to create a Space Force is championed by supporters as a way to deter nations that plan to weaponize space.

Why it matters: Some experts warn that the U.S.' renewed focus on space weaponization is actually validating adversaries that hope to bolster their own military uses of outer space.

Last week, SpaceX launched the final test of Starhopper, a prototype of its Starship spacecraft that is designed to eventually take 100 people at a time to deep space destinations like the Moon or Mars.

Context: SpaceX is building on the reusability of its Falcon 9 and Falcon Heavy rockets with Starship, but the new interplanetary system will have some key differences.

Scientists have developed a fingerprint of Earth from space that could one day help identify other habitable worlds light-years from our own.

Why it matters: If researchers find a planet that matched Earth's fingerprint — which shows what Earth would look like in infrared if seen by an alien civilization — out there in the universe, it could indicate they've found a habitable world.

The National Weather Service issued a tweet Sunday to stress that Hurricane Dorian will have no impact on Alabama after President Trump claimed that the state would be affected by the category 5 storm.