Whether space-time exists should be neither controversial nor even conceptually challenging, given the definitions of "space-time," "events" and "instants." The idea that space-time exists is no more ...

Oftentimes, we think of space as an endless, mostly empty vacuum, a silent backdrop where planets, stars, and galaxies play out their dance. We also think of time as something separate, a steady ...

WASHINGTON — The European Space Agency has released a strategy for its next 15 years that includes a greater emphasis on autonomy amid broader geopolitical changes. ESA released March 20 its Strategy ...

The next year is crucial for the future of NASA and its plans to extend human activity in low-Earth orbit. For the first time in decades, the US space agency faces the not-too-distant prospect of ...