A new study of Moon dust finds evidence of a supernova that occurred just 300 light years away.
You’re Watching DSN
The Deep Sky Network is a collection of radio antenna dishes located in Madrid (Spain), Canberra (Australia) and California in the U.S.
Cassini and the Ninth World
The Cassini spacecraft orbiting Saturn may have felt the gravitational pull of a ninth planet.
Amateur Astronomers Capture Jupiter Impact
On Monday amateur astronomer John Mckeon captured an unusual flash on the limb of Jupiter while he was filming the planet through a telescope.
What Makes A Planet A Planet?
When astronomers are asked “Why is Pluto no longer a planet?” the bigger question strikes at the heart of what a universal definition for a planet would be.
Dance Of The Planets
Earth’s orbit is stable, but it does vary over time.
The Possibility Of Planet Nine
There may be a large planet lurking in the outer solar system.
End Of Days
The Sun is getting warmer, and on a geological scale it has dire consequences for life on Earth.
Relative Units
So why did the IAU adopt a fixed standard for the astronomical unit? In the actual 2012 resolution, the possible drift due to the Sun’s mass loss is listed as one reason, but the main reason was the need for self consistent units in the framework of general relativity.