Rosetta’s Final Mission

Tomorrow, one way or another, the ESA’s Rosetta mission is coming to an end.  In a final maneuver, the craft will attempt to land on the surface of the comet, following in the footsteps of the Philae lander, though hopefully with more success. The video shows the final orbit plan, and really highlights how amazing mission scientists are to be able to plan a landing site when the comet is rotating so quickly, relative to the craft’s motion. You can follow the link to watch the live broadcast of the event here.  The mission will end around 7:20am EST tomorrow,...

Planetary Nebulae

Some of the most gorgeous, ghostly, and variable objects in the universe are planetary nebulae.  They are all formed in a similar process, as a low-mass star (like our Sun) sheds it’s outer layers of gas and dust, heating them to a glow as they disperse over hundreds of millions of years.  A few Billion years from now, the Sun will undergo the same major state change.  When this happens, perhaps other species in the far future will gaze upon it and marvel at its beauty. One of the difficulties in studying a planetary nebula is measuring it’s distance from...