Comet or Asteroid?

What is the difference between a comet and an asteroid? The typical response is that an asteroid is rocky and a comet is icy/gassy.  Further than this, asteroids typically orbit closer to the Sun than Neptune, and comets orbit beyond this loose dividing line.  But as with everything in nature, there are often exceptions to the rule. C/2014 S3 […]

A Lonely Universe?

Life in the universe is a fascinating topic.  The simplest question: Are we alone? It breeds so many deeper and more profound scientific questions, like “How many habitable planets are there?” “How likely is life to develop on any given planet?” and “How long can a civilization survive?” We can’t answer them definitively, but we […]

Stellar Snowball

The closest star to the Earth, aside from the Sun, is Proxima Centauri, a small red dwarf star that is part of the Alpha Centauri system, roughly 4 light years away.  If you don’t know light years, the distance is a staggering 37,800,000,000,000 Km.  Beyond that our stellar neighbourhood fills in as you move 20 […]

Narrowband Spaghetti

I’ve written many times about the power of looking at different wavelengths of light to study different properties of the universe.  From a visualization standpoint, there are other techniques that give you additional power when imaging.  More than just the wavelength of light you’re using to show the detail, you can choose the range of wavelengths to […]

Moon Outshines the Sun

When could the Moon possibly be brighter than the Sun? The Sun is much bigger, produces energy, and gives all the energy needed for life on Earth.  But if you look at the sky in gamma rays, the highest energy photons on the electromagnetic spectrum, you’ll see the Moon more easily than the Sun.  Why? […]

Makemake Moon

Hubble just discovered the newest moon in the solar system, a tiny rock orbiting the dwarf planet Makemake, far beyond the orbit of Neptune. The new moon is about 250 Km across, compared to the 1,400 Km wide Makemake.  It orbits in approximately 12 days, and has an edge on orbit, making it difficult to […]

Titanic Methane Seas

Even after a decade of interloping among the Saturnian system, the Cassini spacecraft is still doing great science.  It helps that there are lots of places to visit, since Saturn has 62 moons and the largest ring system of the gas giants.  Arguably the best science has come from Saturn’s largest moon Titan, second largest […]

Blast From The Past

A supernova is the death blast of a giant star, far larger than our Sun.  Massive stars go out with a bang, outshining entire galaxies, allowing us to see them across the universe.  A supernova observed in 2013 occurred in a distant galaxy and took over 30 Million years to reach Earth, where the timing […]

Hubble Bubble

Not to be confused with Canadian Gum Hubba-Bubba, Hubble has released a great birthday image for it’s 26th birthday.  I’m a few days late to celebrate, but it’s still a beautiful image. Known as NGC 7653, the Bubble nebula is 8,000 light years distant in the constellation of Cassiopeia.  The reason for this natural bubble […]