Deductions reduce taxable income and their value thus depends on the taxpayerâs marginal tax rate, which rises with income. Credits reduce taxes directly and do not depend on tax rates. However, the value of credits may depend on the taxpayerâs basic tax liability. Nonrefundable credits can reduce tax to zero but any credit beyond that is lost.
Saturn has at least 150 moons and moonlets, but only 53 of these moons have been given official names. Of these moons, 34 are less than 10 km in diameter and another 14 are between 10 and 50 km in diameter. However, some of its inner and outer moons are rather large, ranging from 250 to over 5000 km.
A collage of Saturn (bottom left) and some of its moons: Titan, Enceladus, Dione, Rhea and Helene. Credit: NASA/JPL/Space Science Institute. Saturnâs moons have such a variety of environments between them that youâd be forgiven for wanting to spend an entire mission just looking at its satellites. From the orangy, hazy Titan to the icy plumes emanating from Enceladus, studying Saturnâs system gives us plenty of things to think about. Not only that, the moon discoveries keep on coming. As of April 2014, there are 62 known satellites of Saturn (excluding its spectacular rings, of course).