Measuring the age of the universe: Beyond the basics Determining the age of the universe is not about guessing. It is a precise exercise in cosmic bookkeeping. Astronomers currently place the age of the cosmos at 13.8 billion years. To reach this number, experts must cross-reference two distinct methods: measuring the expansion of space and … Read more
Understanding Galaxy Evolution: The Astronomer’s Toolkit To study how galaxies evolve, astronomers do not simply take pictures; they act as cosmic archaeologists. They piece together the history of the universe by analyzing light, gravity, and the chemical composition of structures spanning billions of light-years. Because galaxies take billions of years to change, you cannot observe … Read more
Stellar Evolution: The Physics of Cosmic Lifecycles Stars are not fixed beacons of light. They are high-pressure engines engaged in a constant tug-of-war between the inward crush of gravity and the outward push of nuclear fusion. To track how a star evolves, you must look at its birth mass as a predetermined destiny. Think of … Read more
