we do got that technology stlhead, On the 26th of March 1964 this H-bomb test, Castle Romeo, was one of the biggest ever.

The first H-bomb ever 'Mike' was exploded at 7.15 am local time on November 1st 1952. The mushroom cloud was 8 miles across and 27 miles high. The canopy was 100 miles wide. Radioactive mud fell out of the sky followed by heavy rain. 80 million tons of earth was vaporised. Mike was the first ever megaton yeild explosion.

Castle Bravo was a lithium-deuteride fuelled H-bomb exploded 1st March 1954 at Bikini Atoll. It yielded 15 megatons and had a fireball 4 miles in diameter. It was much bigger than the test crews had been expecting. It engulfed its 7,500 foot diagnostic pipe array all the way out to the earth-banked instrument bunker, which barely survived. Test crews were trapped in experiment bunkers well outside the expected limits of its effects. It menaced task force ships, one of which held Marshall Rosenbluth, a U.S. theoretical physicist, "I was on a ship that was thirty miles away, and we had this horrible white stuff raining down on us. I got 10 rads [100 chest x-rays] of radiation from it. It was pretty frightening. There was a huge fireball with these turbulent rolls going in and out. The thing was glowing. It looked to me like a diseased brain up in the sky. It spread until the edge of it looked as if it was almost directly overhead. It was a much more awesome sight than a puny little atomic bomb. It was a pretty sobering and shattering experience." Bravo vaporised a crater 250' deep and 6,500' in diameter out of the atoll rock. The 'horrible white stuff' was calcium precipitated from vaporised coral.

The Soviets put together H-bombs with a yield of 100 megatons but the design was never tested at full strength.

Fifty years on, the Uranium fission bombs dropped on Japan look relatively puny. The Hiroshima bomb was rated at fifteen kilotons or fifteen thousand tons of TNT. It didn’t take long to discover that, with Plutonium, you could set off a thermonuclear reaction - just like the Sun. There is no limit to the size of these Hydrogen (fusion) bombs but fifteen Megaton bombs (a thousand times more destructive than Hiroshima) were tested in the Pacific in the sixties. The Russians had a design for a 100 megaton Hydrogen bomb but apparently never tested it. Only enriched uranium is fissile enough to make a uranium bomb. Hydrick explained that, at $100,000 per ounce in 1945 dollars, the enriched uranium was well worth the investment in gold to protect it.
XX-39 CLIMAX, part of Operation Upshot/Knothole, was a 61 kiloton device fired June 4, 1953 at the Nevada Test Site.

anyways, theres the technology to blow up planets...