Climate scientists are saying we have a controllable/modifiable effect on our climate. Certain politicians are using those claims justify numerous changes to our society (both national and global).
Like any science (including astronomy), climate science has had it's missteps. It happens, it's part of science (yes, it is science) to be wrong. When you're wrong as a scientist, generally, you figure out where you went wrong, figure out what's right and move on. The fact is that politics is now heavily involved in "climate science". The problem isn't necessarily that politics is involved, it's that money is involved. The fact that politics is involved is a prime indicator that an extremely large amount of money is involved. Once you get to that stage, it's very difficult for the current state of climate science (the real stuff) to be wrong anymore. It has to be right, whether or not it is. Climate scientists claim to be vilified, treated like pariahs. Yet, at every turn, any of their skeptics are equally vilified.
It's become too hard for most of us (including some of the loudest proponents of climate science's current state) to see where the money ends, and the science begins. If that gargantuan obstacle weren't enough, we have some obvious problems. First and foremost, the climate changes on its own. It does, really. We've had (at least) two full-on ice ages, plus a mini ice age only a 150-ish years ago. Any guesses on what happens between ice ages? Wait for it
Oh yeah, Mars is warming too. http://news.nationalgeographic.com/news/2007/02/070228-mars-warming.html
These are huge obstacles to proving the veracity of the science itself. And while claiming they're being marginalized, they in turn are marginalizing any and all skeptics. Just watch, if any "climate science" proponent actually reads this far, just for bringing up already "refuted/explained" facts, I'll be shouted down, insulted, and asked for my "proof", or described as an ignoramus for not knowing/believing the existing "proof". And thus the public arena of this science has devolved into a global shouting match. Which only really benefits the people set to reap huge profits from legislation being proposed.
Climate science has some valid points, and getting the research done right is hugely important. But, if it's no longer possible (politically) for climate science's current state to be wrong, then almost assuredly, it will never be (scientifically) right. And, for the last 15 years (probably more), it doesn't look (to me) like it's allowed to be wrong anymore. I tend to rebel against that, simply on principle.
Now, back to the problem at hand. Astronomers don't appear to have hordes of women (or worse, the De Beers corporation) demanding we increase taxes and fund mining expeditions to this diamond planet. So, my reaction to their claim is a random "cool", and I'm done with it.
I've already seen numerous ways that $3.50+/gallon gas affects my life (besides filling up my car). My food costs have gone up, my honey-do list costs have gone up, anything that relies somehow on petroleum products anywhere in the pipeline sees a larger number out of my wallet. Now, based on "massive accumulated scientific evidence", which corporate greed, via politics, has _nothing_ to do with, legislation is being proposed that can increase my electric bill substantially (most notably, cap-and-trade). Yet, based on what I've seen of gas prices (oooh, a real trickle down effect), my electric bill isn't the only hit my wallet is going to take.
Discover something, that may or may not be true, but nobody else really cares about? Whatever. Discover something (again, may or may not be exactly as stated) that creates a vast legion of (nearly religious) believers, a vast potential source of income for certain corporations (at everyone else's expense, of course) and (via the first two) a significant power base for political players. Expect a few skeptics.