DEC 07, 2022 6:00 AM PST

What is a pulsar?

Credit: NASA's Goddard Space Flight Center

We’ve all seen lighthouses on Earth, a spinning light atop a tower that is meant to keep ships from coming to close ashore at night. These lighthouses are designed to keep ships away and out of danger, but did you know that the universe has its own version of a lighthouse? These are called pulsars, which are rapidly spinning neutron stars with extremely strong magnetic fields, which also means they give off extremely high levels of radiation. Much like the lighthouses on Earth that are designed to keep ships away, pulsars are also coincidentally meant to keep objects away, as well.

Like most celestial objects, pulsars have poles, and when they’re faced towards Earth, we can see the rotating light pulses these mysterious objects emit, hence their given name. The first pulsar was discovered by Professor Dame Jocelyn Bell in 1967 when she was a PhD student at the University of Cambridge.

As stated, pulsars are rapidly spinning neutron stars, with the latter being an extremely dense, collapsed core of an exploded star that went supernova, and can range in size from 1.4 to twice the size of our own Sun. It is because of this that scientists study pulsars, as they help us learn more about the physics of neutron stars. This includes observing the how the pulses change over time, which indicates some type of celestial event is happening in the surrounding space.

Along with its lighthouse-like features and teaching us about neutron stars, pulsars are also responsible for scientists discovering the first exoplanets, also known as pulsar planets. While this might seem intriguing for finding life beyond Earth, it is highly unlikely life can survive on these planets due to the aforementioned high levels of radiation the pulsar emits.

Sources: EarthSky, University of Cambridge, EarthSky (2), National Schools’ Observatory, Space Australia

As always, keep doing science & keep looking up!

About the Author
Master's (MA/MS/Other)
Laurence Tognetti is a six-year USAF Veteran who earned both a BSc and MSc from the School of Earth and Space Exploration at Arizona State University. Laurence is extremely passionate about outer space and science communication, and is the author of “Outer Solar System Moons: Your Personal 3D Journey”.
You May Also Like
SEP 24, 2022
Space & Astronomy
The James Webb Space Telescope Observes Neptune and its Rings
The James Webb Space Telescope Observes Neptune and its Rings
The James Webb Space Telescope (JWST) has captured its first image of Neptune, and it is the clearest view of the planet ...
OCT 16, 2022
Space & Astronomy
Astrobiology and Broccoli Gas
Astrobiology and Broccoli Gas
In a recent study published in The Astrophysical Journal, a team of researchers led by the University of California at R ...
OCT 28, 2022
Space & Astronomy
Magma Is Still Shaping The Surface of Mars
Magma Is Still Shaping The Surface of Mars
New research from Nature Astronomy shows that magma is still shaping the surface of Mars to this day. Researchers at ETH ...
NOV 03, 2022
Space & Astronomy
JWST Takes Stunning Image of Pillars of Creation
JWST Takes Stunning Image of Pillars of Creation
The James Webb Space Telescope has taken not just one but two breathtaking images of the Pillars of Creation. Located in ...
NOV 05, 2022
Space & Astronomy
Rare Earth Elements Created in Neutron Star Mergers
Rare Earth Elements Created in Neutron Star Mergers
In a recent paper published in The Astrophysical Journal, astronomers present the first ever detection of rare Earth ele ...
NOV 16, 2022
Space & Astronomy
Where Did the Planets Go?
Where Did the Planets Go?
A new study published in the Astrophysical Journal Letters presents a solution to some mysterious patterns that have sho ...
Loading Comments...