Astronomy Articles

Astronomy is a natural science that deals with the study of celestial objects (such as stars, planets, comets, nebulae, star clusters and galaxies) and phenomena that originate outside the atmosphere of Earth (such as cosmic background radiation). It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe.


dark energy supernova

Dark Energy Part 3: Fitting the SCP Union 2.1 Supernova Data

In Part 1 of this 3-part series, I explained kinematics in Einstien-deSitter (EdS) cosmology and in Part 2, I explained kinematics in ##\Lambda##CDM cosmology…
supernova refsdal

The Reappearance of Supernova (SN) Refsdal

Space is always changing. Over thousands of years, astronomers have attempted to understand the workings. Trying to explain astronomical events offers…
Cosmic Web Connections

The Evolution of the Universe, Cosmic Web and Connections

The universe was not perfectly uniform when it started, some areas had a higher density than others. During the evolution of the universe, these areas…
Gaia search for black holes

Gaia and the Race to Detect More Gravitational Waves

Gravitational waves (GW’s) are disturbances in spacetime produced by any massive object moving asymmetrically. However, only the most massive and most…

3 Possible Models For Why Uranus Spins on Its Side

Uranus spins on its side. Uranus has an obliquity (tilt) of 98º, making its axis of rotation closer to the ecliptic plane than any other planet. It is…
mary Somerville

Mathematician Mary Somerville Features in Google Doodle

The Google Doodle for 2 February 2020 celebrated Mary Somerville, the Scottish polymath and science writer, and with Caroline Herschel, the joint first-ever…
What is Mass Inflation

What is Mass Inflation? A 5 Minute Introduction

Definition/Summary Abstract from Poisson and Israel's 1990 paper, 'Internal structure of black holes'-'The gravitational effects associated with the…

How to Calculate the Spin of Black Hole Sagittarius A*

This Insight takes a look at how it is possible to calculate the spin of Sagittarius A*, the supermassive black hole at the center of the Milky Way using…

Interview with Astronomer Pamela Gay

Please give us a bit of background into your educational and professional life. I'm a public school kid through and through. After going to the local…

How Representative is the Night Sky?

A couple of weeks back, a thread was started about whether or not most of the stars we see at night are brighter than our Sun. The consensus was yes. I'd…

Pluto Quiz: Think You Know Pluto?

Pluto has been in the news quite a bit these past several months. Let's see if you've been paying attention. Feel free to share your score in the comments…

The Last Man On The Moon | A Look Back at Previous Missions

On 11th December 1972, just over 45 years ago, man set foot on the moon for the last time.The Apollo 17 mission manned by Eugene Cernan and geologist…

Approximate LCDM Expansion in Simplified Math (Part 4)

  Part 4: Cosmic Recession Rates An astronomer, accompanied by his amateur relativist friend, aimed a telescope at a distant galaxy and measured…

Learn Solar Eclipse Viewing Basics

Safety Information Before attempting to view a solar eclipse:NEVER view the sun with the naked eye for any length of time, as doing so may cause irreversible…

What are the Fates of Massive Stars

Introduction Deep in the vastness of space, beyond our solar system, stars are born in primordial nebulae, gaseous molecular clouds on the spiral arms…
DH - astrophysics

Interview with Astrophysicist D H

Meet a Mentor is a series to help you get to know your wonderful Mentors better.Constructive questions and comments are welcome!Today we meet:…