Trisha Muro

All Stories by Trisha Muro

  1. Space

    Mysteries about the universe abound, from its beginning to its end

    Scientists have a good understanding of the laws that make our universe tick. But they still don’t quite know how it began — or will end.

  2. Space

    It all started with the Big Bang — and then what happened?

    Scientists explain what really puzzles them about how our universe became what it is today — and what its future may hold.

  3. Physics

    Cosmic timeline: What’s happened since the Big Bang

    Energy, mass and the cosmos' structure evolved a lot over the past 13.82 billion years — much of it within just the first second.

  4. Physics

    Explainer: How the Doppler effect shapes waves in motion

    The Doppler effect describes how waves are compressed or stretched when their source — or receiver — is moving.

  5. Space

    Explainer: All about orbits

    A handful of rules can describe the route some object repeatedly takes around another in space. Calculating that path, however, can be quite complex.

  6. Physics

    Explainer: The fundamental forces

    Four fundamental forces control all interactions between matter, from the smallest subatomic particles to the largest structures in the universe.

  7. Physics

    Explainer: How do mass and weight differ?

    Learn why these terms aren’t the same and which to use where. And should you report your results in kilograms? Pounds? If in doubt, try using newtons.

  8. Physics

    Explainer: Gravity and microgravity

    The force of gravity holds us on the ground, keeps planets in orbit and extends throughout space. A very weak gravitational pull is called microgravity.

  9. Space

    Explainer: Telescopes see light — and sometimes ancient history

    Different kinds of telescopes on Earth and in space help us to see all wavelengths of light. Some can even peer billions of years back in time.

  10. Physics

    Explainer: Understanding electricity

    Here’s what allows you to plug in and power up the devices in your life.

  11. Physics

    Scientists Say: Big Bang

    The Big Bang is the current theory about how our universe came to be. It began with a vast explosion of matter — a very Big Bang.