In this connection, we should remember that the distance measured depends on the time. The diameter of the observable Universe is approximately 91 billion light-years. Here also we must note the word ''observable''. So, there are some areas (maybe very vast) which can not be observed with...
An object takes 45 years to orbit the Sun. What is its average distance (in AU) from the Sun? About how far is the Earth from the moon? What is the distance from the Earth to Uranus? How far is the moon from Earth? What is the approximate diameter of the Sun?
What is the diameter of the Earth's moon? If a planet's orbital period is 10 years, what is its average distance from the sun? How long is a day on the moon? What is the period of Encke Comet? What phase was the moon in during Apollo 11 mission?
Antenna with symmetrically nodiform flagellomeres, each flagellomere with a bifurcate ascoids; eyes separated by 1 facet diameter, eye bridge with 4 facet rows; aedeagus symmetrical, ejaculatory apodeme straight and narrow in dorsal view; hypopods with five-six tenacula, tenacula decreasing in ...
An illustration of the moon near Venus on Jan. 3. (Image credit: Chris Vaughan/Starry Night) The southwestern sky will provide a beautiful photo opportunity on Friday evening, Jan. 3 when the slender waxing crescent moon will shine near the brilliant planet Venus. They'll be close enough to...
什么是太阳(Whatisthesun) Thesunisanormalstar,andthereareabout100millionsuch starsintheMilkyWay. Diameter:1,390,000km. Quality:1.989e30kg Temperature:5800open(surface) 15.6m(core) Thesunisthelargestobjectinthesolarsystem.Ithas99.8 percentofthemassofthesolarsystem(Jupiterhasmostof theremainingmass). The...
What is orbital radius? Radius: The most general definition of radius is a straight line from circumference of a circle to its center point. As a number, radius is expressed as the length of that straight line. Ellipses also have radii, but they are expressed as semi-major and semi-minor...
EST is a New Moon, which makes tonight perfect for stargazing. Look to the southwest soon after sunset, and you'll see two bright planets, Saturn and Venus, very close together, with the ringed planet a few degrees above. Look to the left of Venus, and you'll find bright star ...
1) When you talk about the formula 2*pi*r = circumference, r and circumference are usually in length. And this makes sense because if you write pi=circumference/2*r, then it's apparent that they should be since the definition of pi is the length of circumference by...
592 million miles (953 million km) for Jupiter. In spite of appearing to almost touch, Jupiter is more than four times farther than the goddess planet. The showpieces in this week’s conjunction parade: Jupiter, Venus, Mars and Saturn. Credit: NASA/ESA That distance translates to the ...