Welcome to a new series of posts that will characterize 1000 amazing facts about the Universe. There is so much out there that we have yet to learn, and every day, astronomers across the globe are using their research to reveal the deepest secrets of the cosmos. This series will look at the strangest, coolest, most exciting facts that we have discovered in hundreds of years of modern science. Fact #1: The Universe is Far Larger than you Can Possibly Imagine Let’s start with the fastest speed ever travelled by a human being, about 11 Km/s (40,000 Km/h). This is incredibly fast...
If you have ever seen the Andromeda Galaxy, M31, in the sky or through a telescope, you’ll find it’s reminiscent of a small blurry, fuzzy patch, almost like a cloud. The cloudy look is similar to looking at the hazy white glow of the milky way’s concentrated disk. But that cloudy view is not all of M31. The galaxy is so far away, around 2.5 Million light years, that you’re only seeing the concentrated light from its central bulge. You’re actually missing a large portion of the galaxy because its just too dim for your eyes to see. If you can take a...
Looking at the universe in different parts of the electromagnetic spectrum can reveal features and structures that are invisible to human eyes. The vast black emptiness of space explodes into a sea of colour when we use cameras to expand our vision. Looking at a galaxy through human eyes can be a simple and seemingly uninteresting view, but in infrared, microwave, or ultraviolet wavelengths we see the deeper layers of the vast array of stars. The closest large spiral galaxy and a cousin of our own Milky Way, the Andromeda galaxy, is revealed in ultraviolet. The Galaxy Evolution Explorer (GALEX)...
A long time ago in a galaxy far, far away…. Not just the star wars intro, but a true statement if you’re an astronomer. You see, once we start to look deep in space at the more distant objects in the universe, we are actually looking deep in time as well. It all begins with a light year. A light year is not a measure of time, it’s a measure of distance. When you turn on the light in a dark room, the light appears to fill the room instantly. But it actually takes a small amount of time, as light has...
The Andromeda Galaxy is the closest large spiral to our own Milky Way, and the only major Galaxy moving toward us. Turns out its on a direct collision course, but we still have 3.5 Billion years to prepare, so its not exactly pressing news. On the plus side, studying Andromeda allows us to infer properties of more distant galaxies, and it gives us a map of what our own Milky Way Galaxy may look like. Astronomers using the Hubble Space Telescope have discovered a giant halo of gas around Andromeda, and the Milky Way may have a similar one. By...
When I became a Masters student, a big part of the reason I liked the supervisor I had was that she studied M31: The Andromeda Galaxy. Since I was young I was obsessed with finding this galaxy in a telescope, and I will never forget the night I first found it. Seeing that strange fuzzy patch, photons that had travelled for 2.5 Million years through space, it was my first ever experience with ‘time travel’. Consequently, it makes sense that I am excited about a recent Hubble release: the highest resolution photo of the Andromeda Galaxy Ever taken. Let’s start...
You may know that the Universe is much more complex than we know. If you look at nearly anything in a different wavelength of light, new details can pop up that you’d never expect. Astronomers today use all the wavelengths of light to study the Universe. Even the most seemingly boring objects can come to life in different wavelengths. As a prime example, take the Moon. Now I don’t find the Moon boring at all, in fact it’s quite interesting and has a lot of influence on the Earth, so its fun to talk about. But when we look at...
When I do Planetarium shows, one of the things I like to talk about during the Milky Way – Andromeda collision that will happen in 70 Mlllion years, is the fact that very few stars will actually hit each other. Yet we still call it a ‘Galaxy collision.’ One of the questions I always get is “Will the Earth survive this?” I usually ask the audience. The response is usually a unanimous ‘No way!” And then I tell them how big Galaxies are and they can’t believe how unlikely it is that the solar system will be affected. Consider the...
