Here is the next video http://youtu.be/z_RAEESmsrs

1. How far across is the Solar System?
2. What is the first criteria to be a planet in our Solar System?
3. Why did Pluto fail to be considered a planet?
4. How many dwarf planets do astronomers think there may be in our Solar System?
 


Comments

Tanvi
19/05/2011 17:25

1. How far across is the Solar System?

7 billion miles across

2. What is the first criteria to be a planet in our Solar System?

The object must orbit the sun

3. Why did Pluto fail to be considered a planet?

From the criteria pluto failed the third one

4. How many dwarf planets do astronomers think there may be in our Solar System?

42 dwarf planets

Reply
David
19/05/2011 20:40

Hi,

1. At least 7 billion miles across.

2. Because some dwarf planets of the same size or even bigger were only dwarfs. Also it couldn't sustain other objects hitting it.

3. First the object must orbit the sun. Second the object must have sufficient gravity to keep it round. And third the object must have cleared away other objects in its orbital region.

4. There may be as many as 42 dwarf planets in the galaxy.

- David

Reply
Jocelyn
20/05/2011 12:51

Hi,
Here are the answers to the questions.
1. At least 7 billion miles
2. The object must orbit the Sun
3. Clear away other objects from its neighborhood
4. At least 42 dwarf planets

From Jocelyn

Reply
Andrea
20/05/2011 19:17

1. Seven billion miles
2. The object must orbit the sun, must have the right shape and must have cleared away other objects from its nehighbor hood
3.Pluto failed to clear away the other objects from its neighborhoo.
4. 42 dwarf planets

Reply
Kaiya
23/05/2011 18:08

Hi
Here are the answers:
1. How far across is the Solar System?
7 billion
2. What is the first criteria to be a planet in our Solar System?
must orbit the sun
3. Why did Pluto fail to be considered a planet?
must have cleared away other objects
4. How many dwarf planets do astronomers think there may be in our Solar System?
42 dwarf planets

Reply

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