Recent content by Dreksler

I recall something regarding that, possibly that in the back of my mind made me ask the question in the first place. I don't know exactly what more data is relevant to the question. Let's say a fully solid with no gasses planet that is entirely made out of water ice with a diameter of 1,000 km...

Didn't read much about Jupiter recently. The interest in the question started while I was reading up on Super Earths and their composition.

Will there be a compression of matter that the planet is made out of due to gravity when we are talking about planets? If so I would like to know what the effect would be in the example given in the summary.

Okay, I get where I made the mistake now.

Multiplying 510,000,000,000 with 10,000 doesn't get you to the power of 15?

I know, that is what I am questioning.

So I just realized that on the internet the number that frequently pops up with regards to the total mass of the Earth's atmosphere is 5,100,000,000,000,000,000 kilograms. For example, the number is mentioned two times on the Wikipedia page for the Earth's atmosphere, there are more examples...

There is a number floating around on the internet that says that the mass of the Earth's atmosphere is about 5 quintillion kilograms. The way that that number was calculated was through knowing that per square meter of surface area at sea level, about 100,000 Newtons of force is applied, which...

Some estimates through calculating the sun mass loss and increase in mass loss say that the white dwarf phase of the Sun will have roughly about 50% the current mass of the Sun (not sure about it). Whatever the actual mass loss is going to be, assuming that the 50% mass loss is true, where would...

Do we first find out as to what is the gravitational strength of a celestial object and then with that determine its density or do we first know what is its density and then conclude with that as to what is its gravity? Also whether the knowledge about gravitational strength or density comes...

I want to know what are generally the characteristics that can predict or things that could cause the orbit of an object to deviate from zero degrees relative to the equatorial plane of the object that it is orbiting?

We know that galaxies that are 1 megaparsec away from us (3.2 million light-years) are moving away from us here at a speed that is approximately 70km/s. Given that that is the case would that also imply that galaxies that are 312 megaparsecs (1 billion light-years) away from us are moving away...

Thanks!

Thank you!

The HR 8799 star is 129 light-years away from us, in this image we can see thermal emissions coming from these planets. Do these emissions move at the speed of light? If so does it mean that what we are seeing in this image is how the planets looked like in infrared 129 years in the past?