Rosetta Finds Comet Sinkholes Similar to Earth

When the Rosetta spacecraft entered orbit around comet 67P/Churyumov-Gerasimenko, first images captured deep circular depressions among the other surface features.  Now that the orbiter has taken significant observations of the comet’s surface, the science team has concluded that these depressions are actually sinkholes that form by the same processes that form sinkholes 500 Million kilometers […]

Two Weeks to Pluto! Latest News from Final Approach

As is the case with any final approach to a new object, the early images, with their horrible resolution, pixelated appearance, and possibly false features due to processing, lead to significant speculation on what we will see as the craft approaches. It was the same a few months ago with Ceres. I personally love the blurry […]

Venus and Jupiter Hit the Bullseye

For the last few months, Venus and Jupiter have been visible in the night sky.  Venus makes it’s usual 584 day cycle, becoming an ‘evening star’ once again, reaching far from the Sun in the West, while still following our central star.  Jupiter has slowly worked its way westward over the past few months, due […]

Leap Second: Why June 30th, 2015 Will be a Long Day

I presume that you know what a leap year is.  A year is the amount of time the Earth takes to orbit the Sun, and is measured as 365 days, or 365 rotations of Earth.  It is, in reality, a little bit longer.  Each orbit of the Sun takes 365.25 days, or 365 days and […]

Distances in Astronomy

How do we determine the size of the Universe? How do we know how far away the planets and stars are? How can we measure it without ever being there? The answer, as it always is in Astronomy, is light! More Photons = More Science! Here’s my video explaining the concepts of Parallax, spectroscopic parallax, […]