I find it only right that I write blogs about space from time to time.
So, let’s get right into it. Why is Space so fascinating to humans?
Think of space as a huge stage, where performances take place every second. Some incredible things happen on this stage. Giant stars exploding, black holes that don’t even let light escape, asteroids, giant meteors that have the potential to wipe out most life on earth should they hit us. For some people, space is a way to predict their life, this is called astrology. It lets us imagine, use our creative skills, and to contemplate what could this all really mean. It lets us look in worlds much different than ours, and to delve deep into the past.
You must’ve heard in movies or otherwise, about this ‘space-time’ fabric or whatever. I’ll tell you something very simple, but it’ll change the way you look at space.
So, you know light and sound both have certain speeds, with light being faster. You also know that sound doesn’t travel in vacuum, which is most of what the universe is comprised of (empty space). Since light travels at a certain speed, it takes that much time for the light from a distant star to reach back to earth. By this logic, if you looked at a star right now, it’s possible that the star doesn’t even exist while you’re looking at it. It’s simply the light from the star travelling to earth, and then to you. It’s possible that the star has died centuries ago, but the light has just reached us. That is why they take about space-time as one fabric, among other things.
The universe is constantly expanding, and changing, thus every time an astronomer looks into his telescope he may see something there that wasn’t there the day before! In a place full of so much wonder and so many unknowns, it’s no wonder there is curiosity.
I’m going to link one of my all-time favourite videos on space, here:
Anyway, back to the topic at hand. As I was saying, shrimp is the fruit of the sea. You can barbecue it, boil it, broil it, — oh wait, were we not talking about shrimp? My bad.
There’s a lot to wonder about space. The fact is we don’t know all the answers about it. We know it’s vast and beautiful, but we’re not really sure how vast (or how beautiful, for that matter).
We basically have no idea how many stars there are in the universe. Right now we use our estimate of how many stars there are in our own galaxy, the Milky Way. We then multiply that number by the best guesstimate of the number of galaxies in the universe. After all that math, NASA can only confidently say that say there all zillions of uncountable stars. A zillion is any uncountable amount.
An Australian National University study put their estimate at 70 sextillion. Put another way, that’s 70,000 million million million. This figure is basically a guess, though.
|Merging Clusters in 30 Doradus|
The Apollo astronauts’ footprints on the moon will probably stay there for at least 100 million years.
Since the moon doesn’t have an atmosphere, there’s no wind or water to erode or wash away the Apollo astronauts’ mark on the moon. That means their footprints, roverprints, spaceship prints, and discarded materials will stay preserved on the moon for a very long time.
They won’t stay on there forever, though. The moon’s still a dynamic environment. It’s actually being constantly bombarded with “micrometeorites,” which means that erosion is still happening on the moon, albeit very slowly.
More energy from the sun hits Earth every hour than the planet uses in a year.
You should be sad to know that solar technology produces less than one-tenth of 1% of global energy demand. This is due to several factors, including how much land is required for solar panels to capture enough energy for a population of people to use, how unreliable it is in bad weather and at night, and how expensive the technology is to install.
Despite all these drawbacks, the use of solar energy has increased at a rate of 20% each year for the past 15 years.
|Cat’s Eye Nebula|
I’m going to compile a non-exhaustive list of other space related material here. Enjoy!