gravity

4 articles · All tags

• Dark Matter
  Dark matter explained: the invisible mass shaping galaxies, the evidence from rotation curves and gravitational lensing, and the hunt for the unknown particle.
• Kepler's Laws of Planetary Motion
  The three empirical laws describing planetary orbits: ellipses, equal areas in equal times, and the relation between period and orbit size.
• Black Holes
  Regions of spacetime where gravity is so strong that nothing, not even light, can escape from inside the event horizon.
• Neutron Stars
  Ultra-dense stellar remnants formed in supernovae: their structure, the pulsar mechanism, and what their mergers teach about matter and elements.