White Holes and Dark Matter

A couple weeks ago I wrote about black holes and some of the mystery surrounding them... but something even more mysterious, and not as well-known are white holes (see below picture). These are the exact opposite of black holes, spitting out matter, seemingly from out of nowhere! We have

not yet been able to find one of these white holes in real life, but Einstein has mathematically proven that they exist. Although these white holes should exist in theory, there is much debate over whether or not they actually exist in real life. Part of the debate is that they should, in theory, be relatively easy to find, and yet, we've never found one... However, this does not entirely discount the possibility that there are some out there. If you think about it though, if black holes are taking away matter from the universe, shouldn't there be something counteracting this? If matter is being taken away, something must be putting matter back in, or the universe is slowly being eaten up by black holes! If a white hole did, theoretically exist, it would not be as stable as a black hole, and would quickly collapse on itself. Some people actually believe we may have seen white holes in the past, but were not aware of what they were... This article for example, written in May of 2011, speculates as to whether or not they might have actually found the first white hole! there are a lot of people scoffing at the idea, but hey, like Jocelyn Bell Burnell and her discovery of Pulsars, someone will have to find the first one, why not them?!

This brings me to the second idea of this two part post... the idea of Dark Matter. Dark matter is another "space mystery". This is another astronomical issue that Einstein was involved with. His famous equation, E=MC^2 is one of our basic laws of physics. However, when applied to the universe, we realize that we have only discovered about 4% of the matter in the universe! So what about the other 96%? This is what scientists have called "Dark Matter". Basically, we don't know. This opens the doors for creativity and speculation... the possibility of invisible objects (since we cannot see all of the spectrum... perhaps there is more that hasn't been discovered yet). Which is why I decided to talk about White Holes and Dark Matter together... this is purely speculation, just for fun... I definitely do not have the science background to back it up... but what if Einstein's "wormhole theory" (mentioned in the black hole post) was correct, and black holes are actually portholes to other universes? Then the white holes were portholes from that universe to our own? Then for them, our black holes would be white holes, and our white holes would be black holes! This could possibly account for all the missing matter in the universe... maybe it actually contains multiple universes, and since there are so many black holes in our universe, and little evidence of white holes, their universe has most of the matter. Just a little philosophical "what if" thought to end things off :)

Magnetic Storm Hitting the Earth Today?

I was on here checking the weather on the Weather Network last night, and something interesting caught my eye in their 'top news' section at the bottom of the screen... Magnetic storm to hit Earth Tuesday! This is supposed to be the strongest geomagnetic storm in over 6 years!

Basically, here's what happened:
Yesterday (January 23rd) a large sunspot erupted (1402) causing a long-duration M9-class solar flare (almost an X-flare, which is the most powerful kind).

This is called a coronal mass ejection, basically meaning a huge chunk of the sun's atmosphere is currently being hurled towards Earth... You can see what this looks like in the picture above, taken by NASA's Solar Dynamics Observatory, using extreme ultraviolet flash. This coronal mass ejection (or CME) is moving relatively quickly, at 2200 km a second! It is expected to hit earth today at 14:18UT (+/- 7 hours). There could be interferences with satellites, radios, power grids, airline routes and other such things. Here is a video showing what happened:

The cool thing about this is that there will probably be some wicked Aurora Borealis shows in the upper atmosphere! (Northern Lights!)

Black Holes

Well, today I thought I'd talk about something else that is kind of mysterious... anything surrounded by a shroud of mystery is always exciting! Today's topic is Black Holes! There are so many black holes in our universe that it is impossible to count them all! Fortunately, there aren't any that are too close to the earth. Check out this snazzy video and website for a cool visual explanation as to what a black hole actually is and how it works: http://hubblesite.org/explore_astronomy/black_holes/

Basically... in a black hole, gravity is the strongest force, objects are pulled in by this gravity. Once something has entered a black hole, there is no chance of escaping... not even light itself can escape!
There are 2 types of black holes:

1. Stellar-mass: Form from the supernova explosions at the end of the life of a giant star. It is predicted that a new black hole is being born from a supernova every SECOND!
2. Supermassive: These are found in the centre of galaxies... and remember how huge our sun is? (110 earths across!) Well, these black holes are between a million and a billion times bigger! The closest one to us is in the centre of the Milky Way galaxy, 28,000 lightyears away.

Here are some neat facts about black holes:

• Black holes actually can be destroyed! (This was proved by Stephen Hawking in 1974 using quantum mechanics) What actually does happen is that they slowly evaporate, returning their energy to the universe. All of the black holes that have been discovered in our universe, however, are very small, and the time it would take to destroy them would be incomprehensible.
• Black holes can collide! What takes place when this happens is a merging of the two black holes into one big one. This would be an EXTREMELY violent event, and scientists do not even understand everything about it/ what the consequences would be. It would send a ripple through the space-time fabric of the universe... thats a crazy thought eh? the possibility of warping time! No one has actually witnessed this yet.

One of the main mysteries surrounding black holes is what is inside one? No one knows for sure, and it is impossible for us to find out, since nothing can escape, nor transmit information back to earth. Speculations range from a pile of objects and matter at the centre of gravity to a bridge to another universe! Einstein actually had a "wormhole" theory about this, but the solution to his equations had no event horizon...

Invisible Light

So I have a list of 'life questions.' Basically just a list of things that I have wondered, and asked a few people about, but haven't come to any firm conclusions yet... This past week, one of these life questions was answered. I've always wondered if there were colours that we can't see with the naked human eye... colours outside the visible light spectrum. And the answer is YES, there are!

Ultra Violet rays for example, have a very short wavelegnth and are extremely blue, bluer than any of the blues we have ever seen! Although humans can't see UV light, apparently some insects, like bumblebees actually can! Isn't that a crazy concept? Basically scientific proof for invisibility!

This is demonstrated in the layers of the sun. The layer that we can see is called the Photosphere, but there are two other layers, the Chromosphere and the Corona that we cannot see without special equipment because the light from the photosphere overpowers them. In the summertime it is the UV rays that burn us, but we cannot see these rays. Below is a picture of the sun taken at extreme UV wavelegnth!