Physics TWDK Physics doodle by Giles Meakin

Physics seeks to answer the question "Why?" - to describe all the things we see, as well as their motion, behaviour and interactions. The science covers the entire history and future of the universe, and all objects from the fundamental matter we’re made from to the structure of galaxies.

Physicists look for patterns by making observations of the natural world, and models are developed to describe and predict them. Instruments, observations and experiments are then used to test and refine these models. Physicists sometimes aim to describe new things, and other times to improve the accuracy of an existing model. Based on the approach taken, each branch of physics can be divided into two aspects: theoretical and experimental. A key goal is often to combine several models into one - the ultimate goal of physicists in this respect is to complete "the theory of everything", though some believe this to be impossible.

While Theoretical physicists use mathematics to first describe the observed behaviour and then to explain it, experimental physicists perform experiments to test their hypotheses. Scientists believe that no hypothesis can ever be proven, so experiments are instead designed to disprove one - and "failing" to disprove it strengthens our confidence in it. Once a hypothesis is supported by several different tests and becomes accepted, it gets called a "theory" - but experimental physicists will continue to try to find problems with it, so that the theorists can further improve their models.

We've published 22 articles and 33 specialist blog posts about physics so far, featuring 190 unanswered physics questions! But we're not done yet as we still have another 260 physics research areas in our database to write about, so come back soon!

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What’s the Connection Between the Chemistry of a Star and the Formation of its Planets?
13th June, 2021
Scientists seem to have come up with a new parlor game – how many ways can we potentially detect exoplanets?  The two most common methods, the transit method and the Doppler method, each have their own problems.  Alternative methods are starting to sprout up, and a new one was recently proposed by Jacob Nibauer, an … Continue reading "What’s the Connection Between the Chemistr…
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How To Search the Chemical Makeup of Exoplanet Atmospheres for Hints at Their History
13th June, 2021
Author’s note – this article was written with Dr. Vincent Kofman, a scientist at NASA’s Goddard Space Flight Center (GSFC), and the lead author on the research it discusses. Thousands of exoplanets have been discovered in the recent decades. Planet hunters like TESS and Kepler, as well as numerous ground-based efforts, have pushed the field … Continue reading "How To Searc…
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The Moons of Rogue Planets Could Have Liquid Surface Water and Thick Atmospheres. They Could be Habitable
11th June, 2021
A rocky world might not need a star to be habitable. It might just need to orbit a large gas planet. The post The Moons of Rogue Planets Could Have Liquid Surface Water and Thick Atmospheres. They Could be Habitable appeared first on Universe Today.
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Your first memory is probably older than you think
11th June, 2021
We tend to remember ourselves as older than we were during our earliest memories.

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Image credit: ©
Electrons
For subatomic particles, electrons are pretty well understood. But we still don’t know what they are, where they are, nor how they spin nor what spin is.
Image credit: ©Courtesy: The Institution of Mechanical Engineers, IPECHE
Geoengineering
Geoengineering the climate would mean venturing into new technology with huge consequences. But what might those consequences be and is there an alternative solution to anthropogenic climate change?
Image credit: ©Photo: R Fletcher-Wood, Artist: Jason Heppenstall
Ambient chemistry
Chemists are exploring ways to mimic nature’s selective, low-temperature biochemical reactions that make delicate and reactive structures. Previously, chemists had copied high temperature geological reactions.
Image credit: Public Domain via Alexas_Fotos (Pixabay)
Time
What is time? We can measure it in terms of regular events like the Earth moving round the sun, but it can change with perspective, known in relativity as time dilation, and depends upon our perspective.
Image credit: ©
Entropy
Entropy or disorder, is a scientific measure of things spreading out, of uncertainty, or of the information required to describe something. Entropy always increases, so what impact does it have on our universe, our materials, and our concept of exist
Image credit: ©Andrew (Flickr, attribution)
Plastics
What happens to plastic when it gets disposed of into the environment, and how might it affect us?

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Our latest physics blog posts

Our blog posts focus on a specialist topic.
Many are written by scientists about their ongoing research, others by the TWDK team.

TWDK red science flask
Categorising Things is “Evil”
Thursday 21st of May 2020
TWDK red science flask
Magnetic Monopoles and Geometry
Tuesday 1st of October 2019
TWDK red science flask
Mysterious Mo
Thursday 15th of November 2018
TWDK red science flask
Is there a ninth planet in our Solar System?
Thursday 22nd of September 2016
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The Search for the Graviton
Monday 15th of August 2016
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The Case of the Jumping Carbons
Saturday 18th of June 2016
More blog posts about physics...

Delve deeper into Physics

Can't find what you're looking for? Browse the branches of physics that interest you most.

TWDK magnifying glassAstronomy is one of the oldest subjects of study. It seeks to understand everything outside of our world and explain how it got there.

TWDK magnifying glassAtomic Physics is all about the interactions between matter (the stuff everything is made from) and more matter, or between matter and light.

TWDK magnifying glassBiophysics uses the principles of physics to study life at every level, from atoms and molecules, to cells, organisms and environments.

TWDK magnifying glassChemical Physics is the study of chemical processes in terms of the atoms and particles that make up a system.

TWDK magnifying glassClassical Physics deals with the physics of everyday things - from ice cubes to bicycles, or cups of tea. Things we take for granted, but often don't really understand.

TWDK magnifying glassElectromagnetism is the study of one of the four fundamental forces in nature - the electromagnetic force, which mediates interactions between charged particles.

TWDK magnifying glassGeophysics refers to the study of the physics of the Earth and its environment in space, including its gravitational and magnetic fields, and its atmosphere.

TWDK magnifying glassMaterials Science deals with the structure and properties of materials.

TWDK magnifying glassMedical Physics ranges from enhancing diagnostic imagery to developing new techniques and equipment with which to treat patients.

TWDK magnifying glassParticle Physics is the study of the smallest things in the universe and the forces that govern their behaviour.

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