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Showing episodes and shows of
Ata Sarajedini
Shows
Astronomy Minute
Why do We Study Astronomy?
A brief description of why we study the nature of the Universe. We are mainly interested in gaining knowledge about the universe for the sake of the knowledge itself.
2020-12-16
01 min
Astronomy Minute
The Universe as a Time Machine
A brief description of how the finite speed of light can be used to our advantage - allowing us to look back in time to see the history of the Universe.
2020-12-11
01 min
Astronomy Minute
How Old is the Universe, the Sun, and the Earth?
A brief description of how old the universe is as compared with the ages of the Sun, the Earth, and how long Homo Sapiens have lived on the Earth.
2020-12-11
01 min
Astronomy Minute
What is a Light Year?
A brief description of a light year - a unit of distance based on how far light travels in one Earth year.
2020-12-09
01 min
Astronomy Minute
What is Electromagnetic Radiation?
A brief description of electromagnetic radiation - that is to say light - and how its wavelength, frequency, and energy are related.
2020-12-04
02 min
Astronomy Minute
What is Meant by the Hubble Flow?
A brief description of the term Hubble Flow in astronomy. The universe is expanding on the largest scales, and this large-scale expansion of the Universe is known as the Hubble Flow.
2020-12-04
01 min
Astronomy Minute
What is a Blackbody Curve or Planck Curve?
A brief description of Blackbody or Planck curves. In short, these curves tell us the brightness of stars of a certain temperature.
2020-11-29
02 min
Astronomy Minute
What is Precession of the Equinoxes?
A brief description of the phenomenon known as Precession of the Equinoxes.
2020-11-29
01 min
Astronomy Minute
What is Meant by the Signs of the Zodiac?
A brief explanation of the zodiac and how it relates to the other constellations in the sky.
2020-11-25
01 min
Astronomy Minute
Is There Life Elsewhere in the Universe?
A brief order-of-magnitude description of the probability of life elsewhere in the universe beyond earth.
2020-11-22
01 min
Astronomy Minute
How Old is the Solar System?
A brief description of two independent methods that give an age of 4.5 billion years old for the Solar System.
2020-11-17
02 min
Astronomy Minute
How Did Our Galaxy Form?
A brief description of how we think the Milky Way galaxy formed. Basically, it's a process whereby hundreds to thousands of low-mass dwarf galaxies collided and coalesced to form our our galaxy.
2020-11-14
01 min
Astronomy Minute
Is There Such a Thing as THE Dark Side of the Moon?
A brief description of why there is no such thing as the dark side of the Moon.
2020-11-06
01 min
Astronomy Minute
What is Meant by Taxonomy in Science?
A brief description of taxonomy in science and how it is used to classify objects that are similar to each other.
2020-11-06
01 min
Astronomy Minute
What are the Magellanic Clouds?
A brief description of two dwarf galaxies known as the Large and Small Magellanic Clouds that are in orbit around own Milky Way galaxy .
2020-11-06
01 min
Astronomy Minute
What do I Need to Know About Isaac Newton?
A brief description of Isaac Newton's contributions to science and mathematics. More information is available in the podcasts entitled “What are Newton’s Laws of Motion?” and “What is Newton’s Law of Universal Gravitation?”
2020-10-29
00 min
Astronomy Minute
What do I Need to Know About Galileo?
A brief description of Galileo's contributions to astronomy.
2020-10-28
01 min
Astronomy Minute
The Clockwork of the Universe
A brief description of how the motion of the Moon around the Earth, the Earth around the Sun, the Sun around the center of our galaxy, and the motion of the galaxy itself are like clockwork.
2020-10-28
02 min
Astronomy Minute
What do I Need to Know About Johannes Kepler?
A brief description of Johannes Kepler's main contributions to astronomy.
2020-10-28
00 min
Astronomy Minute
What do I Need to Know About Tycho Brahe?
A brief description of Tycho Brahe's contributions to astronomy.
2020-10-26
00 min
Astronomy Minute
What do I Need to Know About Nicolaus Copernicus?
A brief description of the basic contributions Nicolaus Copernicus made to the science of astronomy.
2020-10-26
01 min
Astronomy Minute
How do We Know There are Planets Around Other Stars?
A brief description of the techniques we use to detect the presence of planets orbiting around other stars besides the Sun. These techniques are known as Transit Photometry and Doppler Spectroscopy.
2020-10-21
01 min
Astronomy Minute
What is Meant by a Bell Curve?
A brief description of the definition of a Bell Curve - also known as a Normal Distribution and a Gaussian Distribution; it is very important in the fields of statistics and probability.
2020-10-16
02 min
Astronomy Minute
What are Right Ascension and Declination?
A brief description of Right Ascension and Declination and how they are used to locate objects in the sky.
2020-10-16
01 min
Astronomy Minute
What Causes the Phases of the Moon?
A brief description of what causes the phases of the Earth's Moon. An animation/movie linked off of the web page helps to explain the podcast.
2020-10-05
01 min
Astronomy Minute
What Causes the Seasons on the Earth?
A brief description of what doesn't cause the seasons and what we actually believe does cause them. There is also a graphic linked off the web page that helps explain this episode.
2020-09-29
01 min
Astronomy Minute
What is the Difference Between Precision and Accuracy?
A brief description of the difference between precision and accuracy in astronomy.
2020-09-27
01 min
Astronomy Minute
What is Meant by an Order of Magnitude and a Logarithmic Scale?
A brief description of what we mean when we say that two numbers differ by an order to magnitude. This includes a summary of what a Logarithmic is.
2020-09-16
02 min
Astronomy Minute
Where are the Sun's Siblings?
A brief description of why we expect the Sun to have been formed in a multiple star system and how we are searching for the other stars formed with it.
2020-09-14
00 min
Astronomy Minute
What is the Difference Between Random Errors and Systematic Errors?
A brief description of the difference between random errors and systematic errors in science.
2020-09-09
01 min
Astronomy Minute
What is Meant by the Magnitude System?
A brief description of the magnitude system in astronomy including the difference between apparent magnitude and absolute magnitude.
2020-09-04
01 min
Astronomy Minute
What is the Kelvin Temperature Scale?
A brief description of the Kelvin temperature scale as compared with Fahrenheit and Celsius.
2020-09-01
01 min
Astronomy Minute
What are Comets and Meteor Showers?
A brief description of what comets are and how they are responsible for meteor showers on the Earth.
2020-09-01
01 min
Astronomy Minute
What is the Cosmic Microwave Background?
A brief description of the Cosmic Microwave Background (CMB) also known as the Primordial Background Radiation.
2020-08-27
01 min
Astronomy Minute
How Do We Classify Stars?
A brief description of how we classify stars based on their surface temperatures.
2020-08-25
02 min
Astronomy Minute
What is Meant by Hierarchical Clustering in Astronomy?
A brief description of the concept of hierarchical clustering in astronomy.
2020-08-23
01 min
Astronomy Minute
What is the Interstellar Medium?
A brief description of the main components of the interstellar medium, which is the stuff in space between the stars.
2020-08-23
01 min
Astronomy Minute
What is Meant by Tidal Forces?
A brief description of what tidal forces refer to and why they are important in astronomy.
2020-08-21
02 min
Astronomy Minute
What is Newton's Law of Universal Gravitation?
A brief description of Newton's Law of Universal Gravitation and its applicability.
2020-08-21
01 min
Astronomy Minute
What is the Copernican Principle?
A brief description of the Copernican Principle.
2020-08-21
01 min
Astronomy Minute
What is Dark Energy?
A brief description of Dark Energy, which is causing the acceleration of the Universe.
2020-08-18
01 min
Astronomy Minute
What is Gravitational Lensing?
A brief description of what a gravitational lens is and how it works.
2020-08-13
01 min
Astronomy Minute
How Do We Classify Galaxies?
A brief description of how we classify galaxies using the Hubble Tuning Fork Diagram.
2020-08-13
01 min
Astronomy Minute
What do I Need to Know About the Planet Neptune?
A brief description of some interesting facts about the planet Neptune.
2020-08-11
00 min
Astronomy Minute
What do I Need to Know About the Planet Uranus?
A brief description of some interesting facts about the planet Uranus.
2020-08-11
01 min
Astronomy Minute
What do I Need to Know About the Planet Saturn?
A brief description of some interesting facts about the planet Saturn.
2020-08-11
00 min
Astronomy Minute
What do I Need to Know About the Planet Jupiter?
A brief description of some interesting facts about the planet Jupiter.
2020-08-11
00 min
Astronomy Minute
What do I Need to Know About the Planet Mars?
A brief description of some interesting facts about the planet Mars.
2020-08-09
01 min
Astronomy Minute
What do I Need to Know About the Planet Venus?
A brief description of some interesting facts about the planet Venus.
2020-08-09
01 min
Astronomy Minute
What do I Need to Know About the Planet Mercury?
A brief description of some interesting facts about the planet Mercury.
2020-08-09
01 min
Astronomy Minute
What are the Different Types of Telescopes?
A brief description of the different types of telescopes and the most important characteristic to consider when comparing them.
2020-07-30
02 min
Astronomy Minute
Why is the Sky Blue?
A brief explanation of why the sky is blue within the context of the Scientific Method as described in the episode "What is Science?"
2020-07-29
01 min
Astronomy Minute
What are Interstellar Reddening and Extinction?
A brief explanation of interstellar reddening and extinction and why understanding their effects is important in astronomy.
2020-07-29
01 min
Astronomy Minute
How Did the Earth's Moon Form?
A very brief description of the Giant Impact Hypothesis that describes how the moon formed.
2020-07-29
00 min
Astronomy Minute
What do we Know About the Sun?
A brief description of some of the things we know about the Sun.
2020-07-28
01 min
Astronomy Minute
What is Conservation of Angular Momentum?
A brief description of angular momentum and how it is conserved in rotating systems that we encounter in astronomy.
2020-07-28
01 min
Astronomy Minute
What is the HR Diagram and the Main Sequence?
A brief description of the Hertzsprung Russell (HR) Diagram and its primary feature known as the main sequence.
2020-07-27
01 min
Astronomy Minute
What is the Doppler Effect and Redshift?
A brief description of the Doppler Effect and how it can be used to measure the motion of celestial objects toward (via blueshift) and away (via redshift) from us.
2020-07-24
01 min
Astronomy Minute
What is the Inverse Square Law of Light?
A brief description of the inverse square law of light and how we use it to determine the distances of celestial objects.
2020-07-24
01 min
Astronomy Minute
What are Newton's Laws of Motion?
A brief description of Isaac Newton's three laws of motion.
2020-07-24
01 min
Astronomy Minute
Can the Millennium Falcon Really do the Kessel run in 12 parsecs?
A basic definition of the distance unit we call a Parsec.
2020-07-23
02 min
Astronomy Minute
Does Science Prove Things?
A brief description of how science does not prove things but rather provides evidence in favor of or against a particular theory.
2020-07-23
01 min
Astronomy Minute
How do we know there is a black hole at the center of our galaxy?
A description of the main piece of evidence supporting the hypothesis that there is a black hole at the center of our galaxy.
2020-07-23
01 min
Astronomy Minute
What are Kepler's Laws?
A brief description of Kepler's Three Laws of Planetary Motion.
2020-07-23
01 min
Astronomy Minute
What are Active Galaxies?
A basic description of an active galaxy and how it produces the energy that we observe from it.
2020-07-22
01 min
Astronomy Minute
How Did the Solar System Form?
A brief description of the Nebular Hypothesis which is believed to describe how the Solar System formed.
2020-07-21
02 min
Astronomy Minute
Why Did I Create These Podcasts?
A brief explanation of why I felt the need to create another podcast about astronomy.
2020-07-21
01 min
Astronomy Minute
Will Polaris Always be the North Star?
A description of Precession of the Equinoxes which determines what the north star will be.
2020-07-19
02 min
Astronomy Minute
What Happened to Pluto Formerly Known as a Planet?
A description of one of the main reasons why Pluto is no longer classified as a planet.
2020-07-19
01 min
Astronomy Minute
How Do We Name Stars?
A brief description of how astronomers refer to individual stars in the sky.
2020-07-17
01 min
Astronomy Minute
What is a Constellation?
A brief description of what the ancients and modern astronomers call constellations.
2020-07-17
01 min
Astronomy Minute
What are Variable Stars?
A brief description of the two very broad categories into which variable stars are classified.
2020-07-17
01 min
Astronomy Minute
What is Helioseismology?
A description of what helioseismology is and how we can use it to determine the various properties of the Sun.
2020-07-15
01 min
Astronomy Minute
What do Astronomers do?
A brief explanation of what professional astronomers actually do in their role of applying the scientific method to better understanding the Universe.
2020-07-14
01 min
Astronomy Minute
What is the Difference Between Astronomy and Astrophysics?
What is the Difference Between Astronomy and Astrophysics? In a word, nothing!
2020-07-14
00 min
Astronomy Minute
How do we use Light to Study the Universe?
A brief description of the ways in which we analyze light to help us better understand the Universe.
2020-07-14
01 min
Astronomy Minute
What is the Solar System?
A description of the basic constituents of the Solar System.
2020-07-14
02 min
Astronomy Minute
What is Cosmology?
A basic description of what cosmology is and the assumption we need to make in order to apply it to the universe.
2020-07-14
01 min
Astronomy Minute
What is Light?
A basic explanation of our theory for how light, a.k.a. electromagnetic radiation, behaves.
2020-07-12
01 min
Astronomy Minute
What is the Big Bang?
A brief description of the Big Bang Theory and one of its primary predictions.
2020-07-12
01 min
Astronomy Minute
What is Dark Matter?
A brief description of how we know dark matter exists.
2020-07-10
01 min
Astronomy Minute
What are M-numbers and NGC-numbers?
An explanation of what M-numbers and NGC-numbers mean and represent in astronomy.
2020-07-10
02 min
Astronomy Minute
What is a Galaxy?
A brief description of a galaxy and a cluster of galaxies.
2020-07-10
01 min
Astronomy Minute
What is a Nebula?
A brief description of the 4 types of nebula we have identified in astronomy.
2020-07-10
02 min
Astronomy Minute
What is a Star Cluster?
A description of the different kinds of star clusters and their properties.
2020-07-10
02 min
Astronomy Minute
How do Stars Form?
A brief description of the process by which "A Star is Born."
2020-07-10
01 min
Astronomy Minute
Where do the Chemical Elements Come From?
A brief description of the origin of the chemical elements seen in the periodic table.
2020-07-10
01 min
Astronomy Minute
What is a Brown Dwarf?
A brief description of what a brown dwarf is and how it's formed.
2020-07-09
01 min
Astronomy Minute
What is Science?
A brief description of what science is and how it works.
2020-07-09
01 min
Astronomy Minute
How do we measure distances in Astronomy?
A very brief description of how we measure distances of celestial objects. This is truly a 30,000 foot view of a very complicated subject.
2020-07-09
01 min
Astronomy Minute
What is a Quasar?
A brief description of what a quasar is and what we think they represent.
2020-07-09
01 min
Astronomy Minute
Astronomy is a Science of Extremes
This episode explains how astronomy is a science of extremes.
2020-07-08
01 min
Astronomy Minute
What is the Celestial Sphere?
A brief description of the celestial sphere and how astronomers precisely locate objects in the sky.
2020-07-07
02 min
Astronomy Minute
What is a Black Hole?
A brief description of the basic property of a black hole.
2020-07-06
01 min
Astronomy Minute
What is a Pulsar?
A brief description of the basic definition and properties of a pulsar.
2020-07-06
01 min
Astronomy Minute
How do Stars Die?
A brief description of what happens to stars when they reach the end of their lives.
2020-07-03
01 min
Astronomy Minute
How do Stars Evolve?
A description of how stars live their lives and evolve with a little about how they end their lives.
2020-07-03
01 min
Astronomy Minute
What is a Supernova?
A brief description of a supernova.
2020-07-03
01 min
Astronomy Minute
What is a Nova?
A concise description of novae and what causes them to occur.
2020-07-03
01 min
Astronomy Minute
What is Astronomical Vocabulary?
A description of how astronomers use everyday language to refer to the objects they are studying.
2020-07-03
02 min