Swift catches a Supernova in the act

In a bout of rather fantastic luck, Swift has managed to directly observe the initial x-ray flash of a supernova located in a distant galaxy . Usually by the time supernovae have been located they're already hours old, so this is one of those opportunities to get some new science done.

Bad Astronomy has a very well written page on it. Go, read, and enjoy!

Fun with Earth View

There are all sorts of applets out there that simulate astronomical viewpoints, most of which manage provide a reason to keep procrastinating that little bit longer. Having stumbled across one such thing earlier today, I thought I'd share it.

Earth View allows you to input your own data to gain views of the earth from varying distances, locations and levels of detail. The default setting has a nice night/day sim, lighting up population centres when dark so that they can be seen.

Nifty!

Apod - The Origins of Gold

So gold, you see it all over the place, we make ornaments out of it, use it in expensive electrical devices, and hell, sometimes we even stick it in alcohol and drink the stuff. It's pretty and fairly valuable, but that ain't the half of it... you want awesome? Look at the circumstances surrounding its creation.

Now neutron rich elements such as gold are typically thought to be created in events such as supernovae, and usually that'd be more than cool enough, but it gets better. In our solar system the abundance of gold appears to be much higher than can be explained by conventional means, meaning that likely something else happened.

The answer it would appear, is that something along the lines of two neutron stars colliding could be responsible. In order to fully demonstrate how awesome this is I'd have to jump around making exploding noises and gesticulating lots. You're spared that for now, hopefully the mental image was enough.

Visit today's Astronomy Picture of the Day for the story.

Devils on Mars

Though not of the sort the title may bring to mind, these are of a somewhat less fiery and more dusty variety.

Dust devils form when hot air close to ground level rises through an area of cooler low pressure air above, and are seen all over the world wherever there are flat plains and plenty of dust lying around. Considering Mars meets all the qualifications you may expect to see them there too right?

Right!

On Earth these whirling vortexes of air and dust are typically no larger than three feet in diameter, however on Mars they can be up to fifty times that, big enough even to provide a scare for the rovers currently wandering the surface of the planet.

Here (and in the above link) you can see a fantastic panorama taken from the landing site of one of the aforementioned rovers, and it quite noticeably features quite a few of our friends. I always think images such as these are particularly great as they really help to bring Mars to life, adding real dynamics to the still pictures we usually get back from our interplanetary voyagers.

Venusian orbits

A few days ago ESA's Venus express probe completed its first two years orbiting our sister planet. Since then it has been revising and updating our knowledge of the planet, having already returned to us over 1200 Gig of data.

Among the most recent discoveries is the presence of the molecule Hydroxyl in the Venusian atmosphere. The molecule was detected by the Visible and Infrared Thermal Imaging Spectrometer about the craft at an altitude of around 100km from the planet's surface.

This is significant as it is highly reactive stuff, playing many important roles in the relative abundance of substances such as Ozone in atmospheres.

Full story on the ESA site.

Nasa reveals all

Turns out the discovery mentioned in a previous post was that of a supernova remnant in our galaxy a mere hundred years or so old.

Radio and X-ray composite of G1.9+03

The Supernova who's official name is G1.9+03 is located right near the galactic centre at a distance from us of about 27,000 lightyears, and is the youngest supernova remnant that has ever been observed in our galaxy.

Very cool stuff. It's a rare opportunity to get some serious observations in on a remnant at such an early stage, and in a place where they can continue for a long long time.

Just noticed Phil Plait at Bad Astronomy has a fantastic rundown already up, so go there and read it!

Interesting Lectures - Part 2

So this week's lecture is part 7 of a 27 part series by Richard A. Muller, on his course entitled Physics for Future Presidents. The idea is that the whole course would give any potential president the knowledge he'd need to actually make informed decisions on the physical world and essential matters in physics that may be dealt with on a regular basis in that particular line of work.

Mandatory for all world leaders. If only eh?

In any case this part is entited Nukes, and you've guessed it - it involves some fun fun nuclear physics. Contained therein is an overview of the mechanics behind the bombs and reactors.

Everyone loves some good old fashioned particle physics, of the sort that was around back when things such as quarks were but a mere glint in a young physicists eye!

Nasa plays it mysterious

For the moment in any case.

NASA has scheduled a media teleconference Wednesday, May 14, at 1 p.m. EDT, to announce the discovery of an object in our Galaxy astronomers have been hunting for more than 50 years.

So we'll know tomorrow!

Considering the discovery involves the Chandra observatory, it's going to be something that involves X-ray wavelength related stuff, which narrows the field down somewhat.

So black holes, supernovae, neutron and white dwarf stars, active galaxies and quasars even entire galaxy clusters could be involved, and thats just off the top of my head.

Edit: Evidently the Chandra observatory has recently been concentrating on our galactic centre, which would suggest that if this discovery is recent, it is possibly related to our rather massive black hole friend in the middle of our galaxy.