The Milky Way, the galaxy containing our solar system, is about 100,000 light-years in diameter and about 10,000 light-years thick.
Aphelion: see Orbit.
Apogee: see Orbit…
You’ve probably heard of the theory of relativity. And you may even know that motion, mass, energy, time and space are all relative. But if you’re confused about what any of that actually means…
Think the Empire State Building, Grand Canyon and the Eifel Tower are the most-visited tourist attractions in the world? Think again. by Jennie Wood Grand Central Station, New York…
Kidneys: Not Just for Urine!Anatomy and PhysiologyHormonesFeedback: Not Just for GuitarsHow Hormones WorkHypothalamus: The Head HonchoPituitary: The First LieutenantThyroidKidneys: Not Just for…
WHAT IS THE MOON MADE OF? HOW DOES THE MOON AFFECT EARTH? PhasesFIND OUT MOREIn space, the closest object to Earth is the Moon. It orbits Earth, and appears to change shape as it moves—the…
A Twice-in-a-Lifetime Event by Shmuel Ross This feature was written in the summer of 2004. Book a trip to Africa, and pray for clear skies. That’s one possible reaction to the upcoming transit…
WARNING!LOOPS IN THE ATMOSPHERESPOTS ON THE SUNNEUTRINOS FROM THE SUNSPACE WEATHERSOLAR ECLIPSEFIND OUT MOREDominating our corner of space is a star we call the Sun. It travels through space…
This table provides the name and state of the women serving in the 112th Congress, which began in 2011. There are 80 women in the House of Representatives and 17 women in the Senate. State…
This table provides the name and state of the women serving in the 113th Congress, which began in 2013. There are 81 women in the House of Representatives and 20 women in the Senate. State…
