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Category Archives: Light
The Ultimate Race
We take it for granted that the speed of light is the universal speed limit; nothing can go faster than light. The knowledge of light-years is crucial to understanding the images that we see in the night sky. These images are not of the celestial bodies as they currently exist, but as they once were, […] Continue reading
The myth of travelling at Light Speed
3*10^8 m/s. Wow. It’s practically impossible to conceptualize something moving 300 thousand Kilometers every single second, but believe it or not photons are doing this as we speak. To put this blistering pace into perspective, the distance from the North Pole to the South Pole is about 20,000 kilometers. Not even close to the length […] Continue reading
Light: Dangerously Fast?
Gamma Ray Burst Close-Up Credit: NASA/Swift/Mary Pat Hrybyk-Keith and John Jones The Image above is an artists rendition of a phenomena known as a Gamma Ray Burst (GRB), where a star can project massive amounts of dangerous high energy light across the Cosmos. GRB’s are bit outside the scope of our solar system, so I […] Continue reading
Achieving Light Speed: Curvature Propulsion
Space curvature propulsion is a theoretical idea that has been explored through science fiction (including Cixin Liu’s Remembrance of Earth’s Past trilogy) as method of allowing ships to travel through space at or beyond the speed of light. While this idea currently resides firmly in the realm of science fiction, the theoretical basis is rooted […] Continue reading
Posted in Class, Light, Space Travel
Tagged astro2110, blog1, lightspeed, spacetravel
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Legitimate and Illegitimate Cases of Exceeding Light Speed
This image of CERN provided by TIME was taken at the peak of the 2012 craze over the facility’s discovery of neutrino particles breaking light speed. Since the barrier of light speed has been such an insurmountable rock and cornerstone of physics, the neutrino’s clocked speed increase of 0.0025% was groundbreaking. Although I was only […] Continue reading
Using Variable Stars to Find Exoplanets
One of the preeminent methods for finding exoplanets is tracking periodic variations in stellar brightness. In class, we practiced this technique by examining the light curves of certain variable stars and identifying the presence of orbiting exoplanets. In the real world, scientists must first identify variable stars and then determine which of these variable stars’ […] Continue reading
Posted in Instruments, Light, Observables, Science
Tagged astro2110, blog5, Research, technology
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Black Holes: A great mystery of the universe
Black holes are one of the greatest mysteries of our universe. However, using just a few concepts that we have learned in class, we can understand the basic constructs of black holes. A black hole is the result of a single point in space containing extreme mass (this point is called a singularity). Similar to […] Continue reading
Posted in Light, Physics, Universe
Tagged astro2110, Black Holes, blog6, escape velocity
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Where does the speed of light come from?
It might seem that the definition of the speed of light is simple–light can only physically go as fast as 300,000 km/s. This is true, but there is a lot more that goes into that number, and it doesn’t really have much to do with light. There is a lot more that goes into that […] Continue reading
Posted in Class, Historical, Light
Tagged astro2110, blog4
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Earth’s Atmosphere and Life
Earth’s atmosphere is conducive to life in a way other terrestrial worlds’ atmospheres are not. This is because of the greenhouse effect, which keeps Earth warm and allows water to exist in its liquid form. Other planets such as Mercury which do not have an atmosphere or the greenhouse effect are extremely hot during the […] Continue reading
Northern Lights
The Northern lights are one of the most sought after views that light up the night sky. There is a burst of colors of greens, blues and purples that dance across the sky. But what exactly causes this astonishing sight? Many ancient civilizations have been observing this celestial phenomenon long before us, and have come […] Continue reading