The Solar System | Astronomy.com

A color photograph shows a gold medal hanging from a blue-and-white striped ribbon, centered against a solid white background. The circular, textured gold medal features an engraved tree in the middle and is adorned with alternating red and green gems around its outer edge. The ribbon above it is arranged into a neat bow with a circular pleated rosette at the center.

Today in the History of Astronomy

July 25, 1920: The birth of Chushiro Hayashi

Why are craters perfectly round even though meteorites are irregularly shaped?

How often does Earth transit the Sun for an observer on Mars?

Robotic Spaceflight, Science, Solar System, Space Exploration

Amino acids in Bennu may have formed differently

Science, Solar System

Did Earth’s water really come from meteorites?

Science, Solar System

Has Mars had an effect on Earth’s climate?

Science, Solar System

Does Titan have an ocean or not?

How we track near-Earth asteroids

Science, Solar System

Can Mars’ ice confirm past life?

Science, Solar System

Mars’ ice has been disappearing

Could asteroids near Venus pose a threat to Earth?

Planetary scientists find a seasonal ozone layer on Mars