In the PHB description of the flaming sphere reads:

...any creature that ends its turn within 5 feet of the sphere must...

Does this mean flaming sphere affects a sphere with the diameter of 15 feet (5 feet from itself, 10 feet towards either direction)? Also does ramming the sphere requires placing the sphere at the location of the enemy directly, or will it still damage as long as the creature is in the effected range of the spell?

The description of the flaming sphere in the PHB reads:

Any creature that ends its turn within 5 feet of the sphere must [...]

Does this mean flaming sphere affects a sphere with a diameter of 15 feet (5 feet from itself, 10 feet towards either direction)? 

Also, does ramming the sphere require placing the sphere at the location of the enemy directly, or will it still do damage as long as the creature is in the affected range of the spell?

In the PHB description of the Flaming Sphere reads, "...any creature that ends its turn within 5 feet of the sphere must..." Does this mean flaming sphere effects a sphere with the diameter of 15 feet (5 feet from itself, 10 feet towards either direction)? Also does ramming the sphere requires placing the sphere at the location of the enemy directly or will it still damage as long as the creature is in the effected range of the spell.

In the PHB description of the flaming sphere reads:

...any creature that ends its turn within 5 feet of the sphere must...

Does this mean flaming sphere affects a sphere with the diameter of 15 feet (5 feet from itself, 10 feet towards either direction)? Also does ramming the sphere requires placing the sphere at the location of the enemy directly, or will it still damage as long as the creature is in the effected range of the spell?