Ask Ethan #11: Why does gravity get weaker with distance?

“I wouldn’t know a spacetime continuum or a warp core breach if they got into bed with me.” –Patrick Stewart It’s the end of the week once again, and so it’s time for another Ask Ethan segment! There have been scores of good questions to choose from that were submitted this month alone (and you … Read moreAsk Ethan #11: Why does gravity get weaker with distance?

What does the Universe look like as seen from its most distant galaxy?

“One sees qualities at a distance and defects at close range.” –Victor Hugo A couple of weeks ago we took a look at the most distant galaxy (so far) in the known Universe, a galaxy so far away that it takes exclusively infrared observations from our most power space telescopes (Hubble and Spitzer) in order … Read moreWhat does the Universe look like as seen from its most distant galaxy?

Messier Monday: Andromeda, the Object that Opened Up the Universe, M31

“We find them smaller and fainter, in constantly increasing numbers, and we know that we are reaching into space, farther and farther, until, with the faintest nebulae that can be detected with the greatest telescopes, we arrive at the frontier of the known universe.” –Edwin Powell Hubble With 110 deep-sky objects scattered throughout the heavens, … Read moreMessier Monday: Andromeda, the Object that Opened Up the Universe, M31

The Most Distant Galaxy in the Universe

“People say sometimes that Beauty is superficial. That may be so. But at least it is not so superficial as Thought is. To me, Beauty is the wonder of wonders. It is only shallow people who do not judge by appearances. The true mystery of the world is the visible, not the invisible.” –Oscar Wilde … Read moreThe Most Distant Galaxy in the Universe

What is dark energy?

“Because dark energy makes up about 70 percent of the content of the universe, it dominates over the matter content. That means dark energy will govern expansion and, ultimately, determine the fate of the universe.” –Eric Linder It’s been a while since we’ve spoken about dark energy, and we were just talking about Einstein’s greatest … Read moreWhat is dark energy?

Another Trip Around the Sun

“How old would you be if you didn’t know how old you are?” –Satchel Paige Today marks another year and another trip around the Sun for me. For you, and me, and everything on Earth that makes it through another year on this world, there’s a whole lot we get to experience. Some things are … Read moreAnother Trip Around the Sun