Self-tutoring about astronomy: the tutor mentions the cause of a “blood” moon. As I understand, a blood moon can only happen near the time of a lunar eclipse. The redness of a blood moon comes from the fact that the …
Self-tutoring about observations in the night sky: the tutor mentions one. For months I’ve been noticing a red body in the night sky. Now, with darkness around 5pm, the body is evident earlier. I can’t be sure when it’s central …
Self-tutoring about astronomy: the tutor mentions an interesting fact about the Southern Cross. Apparently, from inside the tropics of the northern hemisphere, the Southern Cross can be seen, low in the sky, during winter and spring. Source: www.constellation-guide.com
Self-tutoring about astronomy: the tutor brings up the famous Southern Cross. I’ve been hearing about the Southern Cross for decades. I decided to look it up. Important with the Southern Cross are two other stars, the Pointers, which are brighter …
Tutoring high school science, you may be asked about the albedo effect. The tutor explains it simply. Albedo means loss of incoming radiation due to reflection. Light and heat are examples of radiation (see my previous post). Regarding Earth’s climate, …
Tutoring science, meteors and their kin might arise. The tutor defines meteor, meteoroid, and meteorite. A meteor is the streak of light you might see in the sky at night, when matter travelling through space enters Earth’s atmosphere. The rock, …
Astronomy: meteor, meteoroid and meteorite: what’s the difference? Read more »