To get the exact Astronomical Unit in kilometers:
astronomical unit
1 Astronomical Unit = 149 598 000 kilometers
To get Google to return the mass of proton:
mass of a proton
proton mass = 1.67262158 × 10-27 kilograms
To get the mass of any planet in solar system from Google, search by:
m_Earth
Will yield the mass of our planet Earth:
mass of Earth = 5.9742 × 1024 kilograms
Try:
m_Mars
And you will get the mass of Mars
mass of Mars = 6.4191 × 1023 kilograms
To get the radius of Uranus:
r_Uranus
radius of Uranus = 25 559 kilometers
The same approach to get the radius of other planets hold true. Also you can get the radius of the Sun:
r_sun
radius of the sun = 695 500 kilometers
Or the mass of the Sun:
m_sun
mass of the sun = 1.98892 × 1030 kilograms