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Article of the Month: Updated June 9, 2016
Hubble's bubble lights up the interstellar rubble
When isolated stars like our Sun reach the end of their lives, they're expected to blow off their outer layers in a roughly spherical configuration: a planetary nebula. But the most spectacular bubbles don't come from gas-and-plasma getting expelled into otherwise empty space, but from young, hot stars whose radiation pushes against the gaseous nebulae in which they were born. While most of our Sun's energy is found in the visible part of the spectrum, more massive stars burn at hotter temperatures, producing more ionizing, ultraviolet light, and also at higher luminosities. A star some 40-45 times the mass of the Sun, for example, might emits energy at a rate hundreds of thousands of times as great as our own star.
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Previous month's article:
NOAA's Joint Polar Satellite System (JPSS) to revolutionize Earth-watching
If you want to collect data with a variety of instruments over an entire planet as quickly as possible, there are two trade-offs you have to consider: how far away you are from the world in question, and what orientation and direction you choose to orbit it.
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Simple and fun learning activities to share with children.
The Space Place Experiment Center—Students can conduct real life science experiments and learn how the world works.
Make a Pinwheel Galaxy pinwheel—Make a pinwheel that looks just like M101, the pinwheel galaxy.
Make a Fan with Earth’s Layers—To remember that Earth is much more than just the surface we see every day, make this Earth layer fan.