Diagram representation of Kepler's laws
Astronomy

The Physics behind Kepler’s Laws

November 20, 2022

Kepler’s laws of planetary motion are not really laws of physics. To understand the reason behind these laws, we need to consider Newton’s law of motion. […]

Diagram showing Kepler's second law of planetary motion
Astronomy

Kepler’s Second and Third Laws

November 20, 2022

Kepler’s second and third laws are about how fast the planets move and about the time required to go around the orbit, respectively. His third law helps measure the mass of everything in astrophysics. […]

An image of Cepheid type stars in a spiral galaxy.
Astronomy

Cepheid variables: The Powerful Beacons

November 18, 2022

Edwin Hubble was able to calculate the distance at which Andromeda nebula is situated using the Cepheids in it. He was able to do so owing to its angular size of a few degrees corresponds to a true size comparable to that of the Milky Way. […]

An image of a spiral galaxy.
Astronomy

The Astronomical System of Units

November 18, 2022

Although while measuring distances between astronomical objects, one can use the unit arcseconds, however, parsec is more preferred as it happens to have the same order of magnitude as the light-year. […]

An image of interstellar space.
Astronomy

How Is the Solar System Mapped?

November 18, 2022

Radio transmitters help us when it comes to calculating and mapping nearby objects in our solar system. To map objects far off in our solar system the parallax equation is used. […]

An image of starry night sky.
Astronomy

Measuring the Stars: Calculating Astronomical Distances

November 17, 2022

Calculating the distance of an astronomical object is still tricky for astronomers. This is because of diffraction. It is caused owing to the wave nature of light, causing inevitable blurring of an image even when seen through a telescope. […]

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