Crash Course
Mercury
Mercury is the closest planet to the sun. It has no atmosphere and is, as such, covered in craters. It's also incredibly hot but, surprisingly, has water ice hiding beneath its surface.
SciShow
The Tiny Planet Revealing Gravity’s Big Secrets
Mercury’s path through our solar system is, well, a little eccentric, and some of its movements were a mystery astronomers couldn’t explain for a long time. Then, in the early 20th century, Einstein reran the numbers and proved a whole...
SciShow
Could There Be Planets Beyond Neptune?
Did you grow up thinking there were nine planets in the solar system? You might have been right all along! Today we discuss the possibility of distant worlds in our solar system.
Professor Dave Explains
Understanding Climate Part 1: Orbital Variations and the Sun
With the scale of ecology now understood, we can start to look at one of the most important concepts in ecology, climate. What is climate? How does it differ from weather? How does climate change over time and why? Let's do a deep dive now!
NASA
NASA | What is a Sungrazing Comet?
Sungrazing comets are a special class of comets that come very close to the sun at their nearest approach, a point called perihelion. To be considered a sungrazer, a comet needs to get within about 850,000 miles from the sun at...
Curated Video
Understanding Planetary Movement: The Science of Orbit
This video discusses the concept of planetary movement or orbit. The video also touches on the different shapes of orbits, the forces of gravity that keep objects in orbit, and the balance between momentum and gravity that is necessary...
Khan Academy
Khan Academy: Precession Causing Perihelion to Happen Later
Clarifies the effect of axial precession on the calendar and the date of perihelion and aphelion. [12:04]
Khan Academy
Khan Academy: Are Southern Hemisphere Seasons More Severe?
Are Southern Hemisphere seasons more severe because of the eccentricity in Earth's orbit? [7:17]