In which phase of the moon does a solar eclipse occur?
A new moon
On March 2 in the Northern hemisphere, what season is it?
Winter
In the Gregorian calendar, is 1800 a leap year? (Yes or No)
No
Which planet is the least dense?
Saturn
What is the period of rotation of the moon?
±27 ⅓ days
Who's sail from Europe became evidence that The Earth is Oblate Spheroid?
Ferdinand Magellan
What is the definition of "period of revolution"?
The time needed for a planet to complete one revolution around the sun.
Which 2 planets have no natural satellite?
Mercury & Venus
Which terrestrial planet rotates from east to west?
Venus
The shape of the Earth is _________.
Oblate spheroid
Which planet has the longest period of rotation?
Venus
What are some names of famous comets?
Halley, Enchke, West, Kohoutek
What is the average temperature of The Sun?
6000° C
What 2 parts of The Sun are it's Atmosphere?
Chromosphere & corona
What satellite of Neptune is the biggest?
Triton
Which planet has the fastest period of rotation?
Jupiter
In the Julian calendar, is 1800 a leap year? (Yes or No)
Yes
Comet Halley is visible from Earth every ___ until ___ years.
75, 76