Celebrate Valentine’s Day in a Special Way
It comes around every year, Valentine’s Day does. And, if you have someone you love who’s a space enthusiast, here’s an idea: buy them a crater on a Mars map. Not only will you look very cool in their eyes, but you’ll be helping fund science education and research. That’s the deal that Uwingu.com is offering for the upcoming lovefest holiday. Find a crater on their Mars map and name it after your loved one, with prices starting at $10.00.
Name a Crater on a Mars Map; Give a Certificate
Sample Mars crater naming certificate, courtesy Uwingu.com.
Not only do you get to explore the surface of Mars on Uwingu’s map, but once you name the crater, you get a downloadable certificate suitable for framing. If you’re feeling a bit more flush, you can order a framed copy from Uwingu.
Name a Mars Crater; Make an Astronaut, Scientist or Teacher Happy
The idea of naming craters on their Mars map is part of Uwingu’s ongoing project to create the first citizen’s Mars map. There are about 500,000 unnamed features on the planet, the map is already the most complete one in the world More than 20,000 features are named. Not only that, but the maps will be taken to Mars on two private space missions in the future. Mars astronauts will have a lot of work to do, and running around naming craters and features will not be high on their list of things to accomplish. Yet, for communication and logistics purposes, having ready-to-use names will be important. Hence the creation of the maps and the invitation to help name all those features. And, as mentioned above, half of the money you spend goes directly to space research and education grants. It’s a win-win scenario for everybody!
A Bridge of Stars between the Magellanic Clouds
The Magellanic Clouds in the night sky. The Large and the Small Magellanic Clouds are visible. The Clouds are moving towards the bottom left corner. Credit: V. Belokurov and A. Mellinger
If you’ve ever been south of the equator, you’ve probably seen the Magellanic Clouds in the southern hemisphere sky. These two little galaxies look like puffy clouds separated by a whole lot of space. It turns out that the light-years between them might not be so empty as astronomers once thought. Researchers at University of Cambridge in England have found what looks like a 43,000 light-year-long bridge of stars stretching from one galaxy to the other. Their work, based on a huge census of stars that the Gaia satellite is doing, is giving a new look at what happens when dwarf galaxies interact. The result of its mission, when completed, will be a 3D map of our galaxy, and apparently of our neighboring satellite galaxies.
Using Old Stars to Trace a Bridge
The Magellanic Clouds, their stellar halos and the RR Lyrae bridge. Pale white veils and the narrow bridge pf stars between the Clouds represent the distribtuion of the RR Lyrae stars detected with the data from the Gaia satellite. Credit: V. Belokurov, D. Erkal and A. Mellinger
The team of astronomers focused their attention on data about stars called RR Lyraes. These are pulsating variables that are quite old stars. They’ve been around for a long time — at least as long as the Magellanic Clouds have existed. So, their very existence tells us something about the history of these two nearby dwarf satellite galaxies. Theastronomers used the RR Lyraes to measure the extent of the Large Magellanic Cloud first. It turns out there’s a sort of fuzzy halo of these stars stretching away from the LMC that’s being stretched out into a evanescent bridge of stars.
The big question now is why this stream exists. Normally streams of stars aren’t stretching away from a galaxy unless there’s been something to tear them away. In this case, it’s likely that the tidal pull of the e Small Magellanic Cloud has steadily lured away stars from the LMC. As it orbits, the LMC is leaving a tracer of its stars as it goes. There could also be stars in the stream that are being attracted by the gravity of the Milky Way, too.
A Bridge of Stars During Interactions
Interactions between galaxies often warp and reshape the participants in the galactic dances. Such interactions are also an integral part of the galaxy assembly process: big galaxies get built from the collisions of smaller ones. We’ve seen streams of stars in other interacting galaxies, so this lovely bridge between the Magellanic Clouds fits right into the idea that cosmic dances can do more than warp galaxies. They can strip stars away, too.
This is a pretty cool story of galaxy evolution taking place in our own galactic back yard. If you want more information on the work the Cambridge astronomers are doing, check out their press release here.