FAS Astronomers Blog

Observing the Night Sky

• The Night Sky
• Observing the Stars
• Observing the Moon and Planets
• The Daytime Moon
• Auroras
• Telescopes
• Planetary Opposition and Conjunction
• A History of the Constellations
• Astrology to Astronomy
• How to Pronounce It

The Earth

• Why is the Sky Blue?
• Meteors, Meteoroids, and Meteorites
• You Don’t Need to Duck
• Rocks and Minerals
• Mapping the World
• Earth Day 2020
• Leap Year, the Solstice, and Seasons

An Overview of The Universe

• The Visible Universe
• The Dark Universe
• The Expanding Universe
• The Microscopic Universe
• The Multiverse

Discovering The Universe

• The Copernican Revolution
• Owen Gingerich
• The Great Debate
• Cosmic Microwave Background
• The History of the Universe
• Geometry, Omega, and the Universe

A Few Odds and Ends

• DNA and RNA
• Viruses and Vaccines
• The Making Of The Atomic Bomb

The Planets

• Mercury
• Venus
• Mars, The Red Planet
  • Journey to a Red Planet
  • Exploring Mars, Past and Present
• Jupiter
• Saturn
  • The Rings of Saturn
  • Titan
• The Ice Giants (Uranus and Neptune)
• Uranus
  • What’s in the name Uranus?
• Neptune
  • The Discovery of Neptune

The Earth’s Past

• A History of the Earth (Geologic Time)
• The Age of the Earth (The Search Begins)
• The Age of the Earth (Finally The Answer)
• The Rise of the Vertebrates
• An Introduction to Dinosaurs
• The Classification of Dinosaurs
• Meet The Dinosaurs
• The Case of the Velociraptor
• The Case of the Brontosaurus
• Asteroid 1 Dinosaurs 0

The Building Blocks of The Universe

• Atoms and Molecules
• The Standard Model of Particle Physics
• Gravity
• The Higgs
• Dark Matter
• Dark Energy
• Black Holes
• Gravitational Waves

Spaceflight

• First Humans in Space
• Project Mercury
• Project Gemini
• Project Apollo
• Houston, we’ve had a problem
• Going Commercial
• Return to the Moon with Artemis
• Return to the Moon with Artemis, Part II

The Solar System

• The Solar System
• The Sun
• The Moon
• The Earth’s 2nd Moon?
• Moons of the Solar System
  • Underground Oceans
  • Water, Phosphine, and the possibility of life elsewhere in the Solar System
• Asteroids
• Comets
• Pluto
  • Discovering Pluto
  • Pluto and the Outer Solar System
  • Reclassifying Pluto
• Exoplanets

Stars

• Stars
• Betelgeuse is dimming
• Cosmic Distances, Stellar Brightness, and The Hubble Constant
• The Harvard Computers

Deep-Sky Objects

• The Deep Sky
• Galaxies
• Globular Clusters (Coming soon)

Observing The Universe

• The Great Observatories
• The James Webb Space Telescope
• Sagittarius A* and the Event Horizon Telescope
• Vera Rubin (The Astronomer & An Observatory)
• A Map of the Universe

Are we Alone?

• The Search for Extraterrestrial Intelligence
• Unidentified Flying Objects (The Beginning)

Mathematics and Numbers

• Happy Pi Day and The Hierarchy of Numbers