La luz más antigua del universo: ¿es eterna?

Elementary particle that composes light and all electromagnetic radiation.

Process in which protons and electrons form hydrogen atoms, allowing photons to escape.

Related to the universe or outer space, especially in terms of its vastness.

Emission or transmission of energy through space in the form of waves or particles.

Change in form, nature, or appearance.

The capacity to do work or cause changes in a system.

Type of matter made up of antiparticles, which have opposite charge to that of common particles.

Grouping of stars that form a pattern or figure in the sky.

Large system of stars, interstellar dust, and gas, held together by gravity.

Thing or situation that is incomprehensible or difficult to explain.