29 Questions
What is the average orbital speed of Venus?
35.0 km/s
What method was used to determine the rotation period of Venus?
Bouncing a beam of microwaves off the surface
What is the angle of inclination of Venus' axis of rotation relative to its orbit?
177.4°
What is the direction of rotation of Venus?
Retrograde
What is the period of rotation of Venus?
243.01 days
What is the hypothesized reason for Venus' axis of rotation being tilted by nearly 180°?
Impact from a large planetesimal
What is the most widely accepted explanation for the retrograde rotation of Venus?
Gravitational interactions with its neighbors
What is the time interval between successive inferior conjunctions of Venus?
583.77 days
Why did no transits of Venus occur during the 20th century?
The orbital plane of Venus is inclined by 3.39° relative to the plane of the ecliptic
What is the order of the rings of Saturn, starting from the planet and moving outward?
D, C, B, Cassini Division, A, F, G, E
What did Galileo Galilei observe around 1610 AD?
The phases of Venus similar to the Moon
What is the name of the largest gap in the rings of Saturn?
Cassini Division
What is the outermost ring of Saturn that can be easily seen with Earth-based telescopes?
A ring
What is the term for the phenomenon when Venus passes across the face of the Sun?
Transit
What is the type of planet that Venus is classified as?
Inferior planet
What is the ring system of Saturn compared to in terms of size?
The distance between Earth and the Moon
What is the unique feature of the Phoebe ring?
It is tilted at an angle of 27° to the other rings
What is the composition of the rings of Saturn?
Billions of small chunks of ice and rock coated with other materials
What is the composition of Uranus' inner moons?
Roughly half water ice and half rock
What is the characteristic of the orbits of exotic Uranian satellites?
Their orbits are far removed from the center of Uranus
What is the color of the outermost ring of Uranus?
Blue
How many distinct rings does Uranus have?
13
What surrounds some of the larger rings of Uranus?
Belts of fine dust
Which planet is the eighth and most distant in our solar system?
Neptune
Who predicted the existence of Neptune before its discovery?
Urbain Le Verrier
What is the radius of Neptune in kilometers?
24,622 km
How many times more massive is Neptune compared to Earth?
17 times
Who discovered Neptune in 1846?
Johann Galle
What is the name of the spacecraft that visited Neptune?
Voyager 2
Test your knowledge about Venus, the planet with a unique retrograde rotation. Learn about its orbital speed, eccentricity, and the challenges of observing its surface. How much do you know about our celestial neighbor?
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