NASA fully fueled its Artemis 2 moon rocket during a crucial test today (Feb. 2) but had to pause the operation twice due to leaks. Will the agency still try to launch on Feb. 8?
A galaxy's powerful magnetic fields have a fundamental effect on light, and it's all because of dust. Tiny dust grains in interstellar space are elongated rather than spherical. In the presence of a magnetic field, these grains align themselves with the field. That means they preferentially absorb and reflect light.

