10 most difficult Solar System riddlesSolar System quiz
Which of Saturn's moons has such distinctive equatorial ridge?
The ridge is 13 km high, 20 km wide and 1300 km long. Its origin is not known, but considering the amount of craters, it's safe to assume that it is a very old geological feature.
What is the second brightest star in the night time sky, after Sirius?
Canopus is the brightest star in the southern constellation of Carina, and the second brightest star in the night time sky, after Sirius. Its name is generally considered to originate from the mythological Canopus, who was a navigator for Menelaus, king of Sparta.
What is the diameter of the Milky Way?
100 000 thousand light years
200 000 thousand light years
500 000 thousand light years
1 000 000 thousand light years
The diameter of our galaxy - the Milky Way is 100,000 light years. The Sun is located about 26,000 light years from its center.
What is the name of the first in history cosmic tourist (astrotourist)?
Neil Alden Armstrong
Dennis Anthony Tito is an American engineer and a multimillionaire, most widely known as the first space tourist to fund his own trip into space. Tito paid a reported $20 million to the Russian Federal Space Agency.
In which phase is the Moon during the solar eclipse?
first or third quarter
it doesn't matter
The new moon is the first phase of the Moon, when its orbit is not seen from the Earth; it is at this moment when the Moon and the Sun have the same ecliptical longitude. The Moon is not visible at this time except when it is seen in silhouette during a solar eclipse when it is illuminated by earthshine.
The largest impact crater of the Solar System is:
Caloris Planitia is a plain within a large impact basin on Mercury, informally named Caloris, about 1,550 km in diameter. It is one of the largest impact basins in the Solar System. The crater, discovered in 1974, is surrounded by a ring of mountains approximately 2 km (1.2 mi) tall.
Who first described the heliocentric model of the Sun and planets? ( with the Sun in the center)
Aristarchus of Samos
Aristarchus of Samos was an ancient Greek astronomer and mathematician who presented the first known model that placed the Sun at the center of the known universe with the Earth revolving around it. He was also the first one to deduce the rotation of earth on its axis. His astronomical ideas were often rejected in favor of the incorrect geocentric theories of Aristotle and Ptolemy. Nicolaus Copernicus attributed the heliocentric theory to Aristarchus.
This is the aurora of Jupiter. What are the visible bright spots caused by?
multiple magnetic poles of Jupiter
Jupiter's moons, especially Io (spot on the left), are powerful sources of auroras on Jupiter. These arise from electric currents along field lines, generated by a dynamo mechanism due to the relative motion between the rotating planet and the moving moon.
Where are the craters of Dostoyevsky, Chopin and Van Gogh?
There are no such craters
Discovered craters on Mercury are named after outstanding artists. In addition to the above, there are also craters on the Mercury map named after: A. Mickiewicz, L. van Beethoven, F. Goya and C. Monet.
The Moon takes just as long to rotate around its own axis as it does to revolve around the planet (Earth). How many other moons in the Solar System share this feature?
most of them
If the rotational frequency of a satellite is larger than orbital frequency, a small torque counteracting the rotation arises, eventually locking the frequencies in a tidal lock. Pluto and Charon are the extreme example, being locked to each other.