英文關鍵字
time
immortal
galactic
phenomenon
eternity
effects
cosmic
examination
infinite
universe
exploration
phenomena
mysteries
celestial
bodies
cycles
evolution
dynamics
stars
galaxies
nebulae
spacetime
expansion
forces
energy
realms
wonders
knowledge
understanding
insights
observations
research
studies
theories
concepts
principles
laws
interactions
relationships
patterns
structures
formations
origins
future
present
reality
existence
life
travel
journey
history
events