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Monthly Archives: February 2017
The Earth’s Gravity
Gravity on Earth acts on all objects with the same force. No matter their mass, objects fall and accelerate at a constant rate. Due to the air resistance of different shapes, this is not always apparent. On a planet or moon lacking oxygen, the law could be simpler to demonstrate. On Earth, falling objects…Read more The Earth’s Gravity Continue reading
2017 Solar Eclipse
Visible solar eclipses are relatively rare phenomenon to witness. They occur whenever the moon gets between the Sun and the Earth. The eclipse must occur with a new Moon to completely blot out the Sun. Because the Moon must be in the right location and phase, these eclipses don’t happen very often. There are three…Read more 2017 Solar Eclipse Continue reading
Tides!
Image of Mont Saint-Michel As we learned from Chapter 4, tides and waves are caused by the actions of gravitational force of the Moon and the Sun. Without tides, scientist won’t be able to predict the alarming predicament of global warming and the beachgoers are not able to enjoy surfing at the beach. There are […] Continue reading
At the end of a rainbow
Ever wonder where a rainbow ends or starts? And what is at the rainbow’s end? Children might think a pot of gold awaits for them there. I might not be able to answer those questions but I can tell you about the colors of the rainbow. The reason why the have different colors.Its because, the … Continue reading At the end of a rainbow Continue reading
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Zodiacal Light and False Dawn
Despite the name, zodiacal light is not a component of a horoscope, but is instead a band of light that is occasionally visible. The phenomenon of zodiacal light is caused by clouds of interplanetary dust particles that orbit the Sun near the ecliptic, similar to the orbit of other planets. The light from the Sun… Continue reading Zodiacal Light and False Dawn Continue reading
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Supermoon
Tides How does tides occur? It is due to combination of gravitational pull of the Sun and moon. Tidal force affects the whole earth but the most significant effect is tidal bulge of ocean. The ground only moves by several centimeters but the sea level can increase up to several feet. Spring tides occur during full … Continue reading Supermoon Continue reading
TWINKLE,TWINKLE, LITTLE STAR
Twinkle, twinkle, little star, How I wonder … WHY DO STARS TWINKLE? To explain this phenomenon, first, we need to know the exact definition of twinkling. The scientific name of the twinkling stars is astronomical scintillation. Twinkling/ scintillation, is a general term for variations in apparent brightness or position of a distant luminous object when viewed through a … Continue reading TWINKLE,TWINKLE, LITTLE STAR Continue reading
Absolute Speed
Light travels the Earth seven times per second, 8.3 minutes to reach the Earth from the Sun, 43.2 minutes to reach Jupiter and the list goes on. One would assume that light travels at an infinite speed because an observer will instantaneously see the light after turning on a torchlight. It is not the case as the … Continue reading Absolute Speed Continue reading
Aristarchus of Samos (c. 310 – c. 230 BC)
A long time ago, in a galaxy far far away……too much of Star Wars (inside joke). I bet most of us in the entire world probably heard of Copernicus. However, only little of us knew about Aristarchus of Samos, ( Ἀρίσταρχος ὁ Σάμιος, Aristarkhos ho Samios-his name in Greek) an ancient Greek astronomer and a mathematician I would say who … Continue reading Aristarchus of Samos (c. 310 – c. 230 BC) Continue reading
Space Shuttle Challenger Disaster
On January 28th, 1986, the space shuttle Challenger broke apart 73 seconds into flight, killing all seven of its crew … More Continue reading