Researchers in the US, Switzerland, and Germany have concluded that changes in the Sun's brightness over the past thousand years have had only a minor effect on Earth's climate, according to a paper published in the September 14th Nature.
The reports are in! Despite a waning gibbous Moon on the evening of August 12th, the Perseid meteor shower did not disappoint. Between twilight and moonrise, observers from dark country skies reported up to 20 “shooting stars” an hour — a meteor every three minutes — some fast and blip-like, some slow and spectacular.
In recent years, astronomers have discovered a handful of dwarf galaxies right next door in the extended halo of the Milky Way, obscured by the gas and dust of our galactic plane. Now, astronomers sifting through data from the Sloan Digital Sky Survey (SDSS) have announced the discovery of two sparse, low-luminosity Milky Way neighbors. Both dwarf satellite galaxies are invisible in most telescopes.