Yes, the universe is expanding — a discovery first made in 1929 by Edwin Hubble, who observed that distant galaxies are moving away from us, with more distant ones receding faster. This expansion is not due to galaxies moving through space, but because space itself is stretching, like dots on an inflating balloon. The light from these galaxies shifts to the red end of the spectrum (redshift), providing evidence of this expansion. Even more surprising is that the expansion is accelerating due to a mysterious force called dark energy, a discovery made in 1998. This expansion supports the Big Bang theory, suggesting the universe began from a much smaller, denser state and has been growing ever since—shaping our understanding of the cosmos and its ultimate fate.

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