15 more (harder) questions about Eris:
The quiz above includes the following questions:
- When was Eris at perihelion (closest distance to the Sun) last?
- When will Eris return at perihelion?
- Eris’s orbit is highly inclined. What is its angle to the ecliptic (the plane of the path the Sun appears to follow in a year)?
- What is Eris’s apparent magnitude?
- How long does it take Eris’s moon Dysnomia to complete a full orbit of Eris?
- Eris’s surface is highly reflective and has an albedo (measure of optical brightness) of approximately ...
- Eris is thought to be much denser than Pluto and therefore to be composed of ...
- How long would a flyby mission would take to arrive at Eris?
- How does Eris’s orbital speed compare to that of the slowest moving planet Neptune? It is ...
- Eris’s surface is composed of a think layer of nitrogen and methane thought to be its frozen atmosphere. It is about ...
- How did astronomers determine the size of Eris?
- Eris was reclassified as a dwarf planet in 2006 because it was initially thought to be a ...
- Eris’s discovery was announced the same day as ...