Which planet is coldest?

Uranus Uranus holds the record for the coldest temperature ever measured in the Solar System: a very chilly -224℃. The temperature on Neptune is still very cold, of course – usually around -214℃ – but Uranus beats that. The reason why Uranus is so cold is nothing to do with its distance from the Sun.

hull.ac.uk - Curious Kids: what is the coldest planet in the Solar System?

How do I find my soulmate at 40?

40 tips from Atlanta's Experts Get into the gratitude habit. ... Set realistic relationship goals. ... Visualize relationship success. ... Take...

Last updated Oct 11, 2019

Does soulmates end up together?

Soulmates deeply understand each other and are able to balance out each other because of their strong connection. Soulmates often end up together...

Last updated Mar 22, 2019

Do you really know who the “One” is? Your true Soulmate?

Promotion

The heat inside planets is left over from when they were formed. Planets are made when smaller chunks of rock smash together, building the full planet piece by piece over many millions of years. Every time these rocks smash together, the planet gains a little more heat. If you clap your hands together for a long time they will start to feel hot – the same thing happens with planets. Neptune wasn’t hit by a huge asteroid like Uranus was, so it has been able to hold on to more of its heat. You might also be surprised to learn that the closest planet to the Sun, Mercury, can also be extremely cold. While the side of Mercury facing the Sun is more than 400℃, the side facing away from the Sun is nearly -200℃. The reason for this is that Mercury does not have any atmosphere, unlike Earth. An atmosphere like ours acts like a blanket, holding heat in and spreading it all around. Because it does not have this blanket, the front side and the back side of Mercury can have very different temperatures.

Measuring temperatures in space

For some nearby planets like Mars, we can send probes to study the atmosphere directly from the planet’s surface. However, we haven’t been able to do this for distant planets such as Neptune and Uranus. Instead, we have to work out how cold they are by measuring their temperature from here on Earth. We do this by studying the light from the planet, which can tell us the types of atoms and molecules which make up the planet’s atmosphere. This information lets us know exactly what the temperature of the planet is: the atoms and molecules act as a kind of temperature “fingerprint” for the planet. While these planets in our Solar System are incredibly cold, there are even chillier places in the universe. The coldest of all is the Boomerang Nebula, a cloud of dust and gas 30 million billion miles away from us. There, the temperature reaches -272℃. Nothing in the Universe can be colder than -273℃, because at that temperature the tiny particles and atoms that everything is made of basically stop moving, and once that happens it’s impossible to go colder. This temperature is known as absolute zero. This means it is unlikely that we will ever find anywhere in the Universe colder than the Boomerang Nebula.

Article written by Professor Brad Gibson

Curious Kids is a series by The Conversation that gives children the chance to have their questions about the world answered by experts. If you have a question you’d like an expert to answer, send it to curiouskids@theconversation.com. We won’t be able to answer every question, but we’ll do our very best. This article is republished from The Conversation under a Creative Commons license. Read the original article.

What is today's art called?

contemporary art Strictly speaking, the term "contemporary art" refers to art made and produced by artists living today. Today's artists work in...

Last updated Mar 10, 2020

Where do you touch a girl when romancing?

Her thighs and behind her knees Her thighs and area behind her knees are the perfect sexual hot-spots when she is aroused and all ready for you....

Last updated Sep 19, 2021

Promotion

Why is soulmate important?

A Soulmate Teaches You A Vital Lesson A soulmate can be a friend, a lover, or even a family member, so it's important to let go of the idea that...

Last updated Oct 5, 2022

Do they remove the brain during embalming?

The answer is no; all of the organs remain in the body during the embalming process. Instead, the Embalmer makes small incisions in the abdomen and...

Last updated Jul 11, 2019

Promotion

What is the strongest love language?

This Is The Most Common Of The 5 Love Languages Words of affirmation: 23 percent. Quality time: 20 percent. Acts of service: 20 percent. Physical...

Last updated Jan 6, 2019

Promotion

When affairs turn to love?

However, one of the signs an affair is turning into love is when you contact them more often than usual. You are missing the person with whom you...

Last updated Nov 25, 2019