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For more amazing images and posts about how Astronomy is Awesome, check us out!

http://astronomyisawesome.com/

As always, please feel free to ask questions and we love it when you reblog!

#astronomy #space #nasa #hubble space telescope #nebula #nebulae #galaxy

“This Love” - Taylor Swift (Piano & String Version) by Sam Yung.

credit to the owners

Chemical flames.

Sea otters—gardeners of the eel grass

Photo: Ron Eby

In the 1970s, researchers discovered that kelp forests are healthier and home to many more species with otters than without them. By keeping kelp-devouring sea urchins in check, otters promote kelp growth, which in turn supports a diverse community of algae, fish, invertebrates, and marine mammals.

If otter abundance is up, so is the kelp’s; if urchin abundance is up, the otter and kelp abundance will be down. This domino effect is called a three-step trophic cascade.

But wait, there’s more!

Photo: Ron Eby

Researchers from UC Santa Cruz monitoring sea otters living in Elkhorn Slough, an estuary in Monterey Bay, noticed something incredible: after otters moved into the area, the eel grass beds became healthier.  They took a closer look and discovered that otters are also a keystone species in the eel grass community!

We’ve been studying sea otters for over 30 years, and they continue to impress us every day. 

Simple actions—like protecting sea otters—can have drastic, surprising, and positive impacts throughout the environment. To find out how you—yep, you, right there—can help us continue our research, take a look at our Sea Otter Program page. 

Here’s to the next 30 years of sea otter research!

The last, but not least of starry scholastic month! 

This week’s entry: Black Holes

http://www.space.com/15421-black-holes-facts-formation-discovery-sdcmp.html

http://www.space.com/19339-black-holes-facts-explained-infographic.html

Lest we forget

funny tumblr [via imgur]

reindeer are the only mammals whose eyes are known to change colour, going from a gold in the summer, when the sun is a constant presence in the arctic, to a less reflective blue in the near perpetually dark winter months. 

in dark conditions, muscles in your irises contract to dilate your pupils and allow more light into your eyes. when it’s bright again, the irises widen and the pupils shrink. the same thing happens in reindeer, but the arctic winter forces their pupils dilate for months at a time.

this constant effort to stay dilated ends up blocking the small vessels that drain fluid out of the eyes, which causes pressure to build up. this in turn compresses the collagen fibers that make up tapetum - a mirrored layer that sits behind the retina (seen in the second photo).  

when compressed, these fibers in the eye reflect blue wavelengths of lights instead of the yellow which accompanies a typical spacing of the fibers, as in summer.  (photos x, x)