Have they reclassified Pluto as a planet?

No, Pluto has not been reclassified as a planet and as long as Eris is out there, bigger than Pluto, it will have to remain a dwarf planet, Captain Kirk.

The discovery of Eris was a main reason why Pluto was “declassified.” Otherwise, how many planets are we going to have to claim exist? Is Eris the 10th planet, bigger than Pluto? Did you know that Charon, Pluto’s moon, is so big that Pluto and Charon orbit each other? The center of gravity is outside the sphere of Pluto itself. Pluto is about the same size as our moon.

How many comets would it take to bring 379 million trillion gallons water? Do you believe that’s how we have water?

“How many comets would it take to bring 379 million trillion gallons water? Do you believe that’s how we have water?” is a great question.

The image below should give you an idea of how much water there is on Earth compared to how much Earth there is without water.

As you can see, it’s not much water in comparison to the big Earth, and therefore only a tiny fraction of the objects that eventually came together to make Earth what it is needed to have water.

Near-Earth Asteroid Flyby

Asteroid 2017 FE1 was first observed by Mt. Lemmon Survey on 2017-03-18

It will fly by Earth harmlessly on 2017-06-16 at 22:16 UTC at 39.9 times the distance to the Moon, at a speed (relative to the Earth) of 10.6 km/s.

It is estimated to be 164 – 518 meters in size.
#space#science#Astronomy#astrophysics#asteroids#NEO near Earth objects#physics

How Big does a Moon Have to Be?

Not very big! It would just have to be natural. Not made by man! And it wouldn’t have to be there for very long either. Just long enough for it to be in orbit.

The astronomical community doesn’t have a definition for moon other than it has to be a natural object. Thus captured asteroids can be moons. It’s even possible for a moon to have a moon!

Mars has two moons, neither of which are large enough to be round. Objects in space get round due to their own gravity. The first image above is Deimos and the second is Phobos, the Martian Moons. Deimos (top) is the smallest. It has a mean radius of 3.9 miles.