Astrophysicists are mapping a vast, hidden structure in space that appears to guide matter and radiation along a kind of ...

Scientists have detected a narrow structure of hot plasma extending from the Local Hot Bubble surrounding the Sun toward ...

Astronomical measurements of motion frequently utilize the Doppler effect, observing shifts in wavelength (or frequency) of emitted waves from moving sources, analogous to a changing siren pitch.

So if our solar system is more or less flat in terms of the planetary rotations around the sun (I'm using typical pictorial depictions of the solar system), what is up and down from our solar system ...

The Milky Way and Andromeda galaxies are predicted to collide and merge between 3.9 and 5.6 billion years from now, based on observed relative motion. The merger process will involve multiple ...