What is the universe expanding into if it’s already infinite? The universe expands by itself, not into any external space, with galaxies continuously moving away from the Milky Way. Initiated by the ...

The atmosphere, a thin veil of molecules enveloping Earth, reaches about 20 miles (32 kilometers) above the planet's surface.

Any chocolate chips or blueberries in the muffin batter become farther away from each other as the muffin batter expands. The expansion of the universe is, in some ways, similar. But this analogy gets ...

Any chocolate chips or blueberries in the muffin batter become farther away from each other as the muffin batter expands. The expansion of the universe is, in some ways, similar. But this analogy gets ...

The universe's expansion rate, a figure called the Hubble constant, is measured in kilometers per second per megaparsec, a distance equal to 3.26 million light-years.

The rate at which the universe is expanding has implications for its ultimate fate: heat death, a Big Rip, eventual collapse into a new all-encompassing singularity, or something else altogether.

Well, it's something called the "Hubble tension," and it's a dispute between observational astronomers and theoretical cosmologists about who's been wrong about how fast the universe is expanding.

Dark energy — an unknown energy source that is causing our Universe’s expansion to accelerate – doesn’t actually exist, according to new research. Dark energy is commonly thought to be a weak ...

the universe is infinite or finite, but it is believed that the universe is expanding based on observational records. If the universe is already infinite, what does it mean for it to expand further?

Howard Berger, the head of makeup on “American Primeval,” a Netflix limited series, thought he had achieved the optimal level ...