The Seven Wonders of the Milky Way
http://www.youtube.com/watch?v=H2jPHp1FkcQ
The Seven Wonders of the Milky Way are:
The Sagittarius stream, a long, complex, structure made of stars that wrap in polar orbit around the Galaxy. It consists of tidally stripped stars from the Sagittarius Dwarf Elliptical Galaxy.
The...
The Universe in 10 Features: 8. Population I Stars
https://www.youtube.com/watch?v=XMeIDu1C5Ls
One of the fundamental laws of the universe is the conservation of Energy. Nothing is created, nothing is destroyed, and all is transformed. And so the death of the original stars brought forth new...
Cecilia Payne-Gaposchkin: the woman who discovered what the Universe is made of.
In this vlog, I talk about Prof. Payne-Gaposchkin, one the most important astronomers of the 20th Century. Thanks to her we know that stars are not made by the same elements as the Earth, and that Hydrogen is the most abundant element in the Universe.
The Universe in 10 Features – 2. Cosmic Microwave Background
The cosmic microwave background or CMB is my second feature for this series. The CMB is formed by the original photons produced in the Big Bang and was created at the last scattering surface.
The Universe in 10 Features: 5. Proto-galaxies
Another important feature in the history of Universe are the proto-galaxies. In the last 30 years we were able to observe only a few dozen of these proto or primeval galaxies, which mostly looked like shapeless blobs with an intense UV emission.
The Universe in 10 Features: 6. Spiral Galaxies
As we've seen in the previous vlog, spiral Galaxies started forming from the primordial protogalaxies about 11 billion years ago. The formation of spiral galaxies is important because it happened at the peak of population II stars formation and allowed for planets to form.
Astroholic Vlog: Dyson Spheres
In this Astroholic Vlog I will be talking about Dyson Spheres. Dyson Spheres are hypothetical megastructures purposely built around stars to absorb most or all of the stellar electromagnetic output.
The idea comes from science...
