ADHD is the most common problem seen in outpatient child and adolescent mental health settings. It is estimated that ADHD affects about 5% of children. Boys are diagnosed with ADHD about twice as much as girls. About 2.5% of adults have ADHD.
Report Abuse. The Milky Way, BY FAR! To give you an idea of size: Our sun, the next biggest celestial object on your list, is about 870,000 miles in diameter. The Milky Way's diameter is about 600,000, 000, 000,000 ,000 miles in diameter!Or in more practical terms: If the sun were the size of a large pin-head, the Milky Way would extend from the Earth to nearly twice the distance to the moon. screaming monk Â· 8 years ago.he Milky Way's diameter is about 600,000, 000, 000,000 ,000 miles in diameter! Or in more practical terms: If the sun were the size of a large pin-head, the Milky Way would extend from the Earth to nearly twice the distance to the moon. screaming monk Â· 8 years ago.
The largest star yet discovered in the Universe is VY Canis Majoris (VY CMa). It is a red hypergiant star located in the constellation of Canis Major. It is about 2000 times the size of our Sun with a diameter of 3,063,500,000,000m.If this star replaced our Sun in the Solar system, it would extend up to Saturn.he real largest star is NML Cygni, 1,650 times the sun's radius! Compare it to VY Canis Majoris' 1,420 solar radii, and you will see what I mean.