[GeronL]

Would it also have 4.5 times the gravity?

talk about sagging!!

[LibWhacker]

If you mean would you weigh 4.5 times as much as on Earth, not necessarily. Gravitational force on a planet's surface is proportional to the product of the masses (yours and the planet's) and inversely proportional to the square of the radius: G ~ Mm/r².

As the radius goes to zero, your weight goes to infinity. As it increases without limit, your weight goes to zero.

So although this planet is 4.5 times the mass of the Earth, if it's radius is large, we could actually be pretty comfortable on the surface. I suspect this is the case because another article I read said the planet is poor in heavy metals (it's not a compact iron ball).

[I see my hands]

"Would it also have 4.5 times the gravity? Talk about sagging!"

Or hanging. Without a natural source of Viagra reproduction as we know it could not exist.

[starlifter]

OR extremely firm!