Techpriest93

Who knows what they could of found? Earth type planet in our back yard? Maybe a new type of exotic planet? Maybe a replica of our solar system? Maybe an open cluster with each star having 1-2 earth sized planets? Maybe they have finally been looking long enough that they are finding Jupiters, Jupiters everywhere! Oh, or Neptunes too... Maybe they have found a star with 2 orbital planets at 90 degree angles to one another? ... Maybe kepler is dead? In that case, this would be a final farewell and a ceremony to look back on the achievements of the little sat. (Or many they got funding for spaceX to launch another satalight!)

Heh, I don't know why I just didn't google the Sun, instead of looking around for stellar density models and the interior structures of stars. Using the information that I provided below, I can safely say that the sun's core is quite larger than I expected. XD I guess I thought of it as this little thing violently reacting and fusing, but it turns out to be more of a calm sphere. It is also a no-go zone, at 150g/cm3 in the core (162.2 at its peak) and accounts for 50% of the stars mass. I will now make an assumption here, and assume that all cores are 50% of the star's mass, for extrapolation to other stars. So, thats at 25-30% of the solar radius. The next 40-45% is the radiative zone, with a density gradient of 20 to 0.2. Could someone help me with density gradiants at 5% intervals? I have a lot of other research and writing to do, (and you would get lots of brownie points). I assume it is logarithmic, and the density dissipates rapidly, but I have been wrong before (like how I didn't realize that the sun is more like a compost heap rather than a fusion bomb). Anyways, the densities that I am looking for are in this area. It is somewhere between 30% and 70% of the solar radii that you can find the density of plasma comparable to density of things on earth, like our atmosphere, then our water, and then our rocks. I will make another assumption and assume that the solar radius of the convection zone is not consistent among other star types. Unless it is logrithmic... Like, Giants and Supergiants probably don't have massive radiative zones. The convection zone, where crazy scary stuff happens, reaches to the "surface" and has 2% of the mass in 66% of the total volume. I believe the density is like 1/6000 that of earth's atmosphere at sea level. Probably not good for a "solar sailer" that has stubby wings and relies on "atmosphere" for lift. Unless their are really strong updrafts in this "atmosphere". I wonder if a hardened probe could use this zone as an atmospheric breaking maneuver if it was shot from our solar system to another with no other way to slow down. Or would it need to briefly dip into the radiative zone to get any meaningful "air" resistance. Would it be called "Heliobreaking", like how you call impacts lithobreaking when you accidentally hit the ground at orbital transfer speeds? I will make another assumption and assume that this zone increases on the age of the star. Like how a red giant would have a huge upper zone that is mostly puffy. If our sun expanded to envelop earth, would the earth still remain when the sun collapses because the density and drag would not overpower the solar wind and pressure coming from the core? Of course, the earth that would remain would be barren and scorched, but would it still be orbiting? (like, not spiraled into the center. It may have migrated inwards, but i dont think it would be destroyed) How are my assumptions? What have I gotten wrong? "The core of the Sun extends from the center to about 20–25% of the solar radius.[61] It has a density of up to 150 g/cm3[62][63](about 150 times the density of water) and a temperature of close to 15.7 million kelvin (K)." "The core is the only region in the Sun that produces an appreciable amount of thermal energy through fusion; 99% of the power is generated within 24% of the Sun's radius, and by 30% of the radius, fusion has stopped nearly entirely." "Theoretical models of the Sun's interior indicate a power density of approximately 276.5 W/m3,[68] a value that more nearly approximates reptile metabolism than a thermonuclear bomb.[e] Peak power production in the Sun has been compared to the volumetric heat generated in an active compost heap.[citation needed] The tremendous power output of the Sun is not due to its high power per volume, but instead due to its large size." "The density drops a hundredfold (from 20 g/cm3 to only 0.2 g/cm3) from 0.25 solar radii to the top of the radiative zone." "At the photosphere, the temperature has dropped to 5,700 K and the density to only 0.2 g/m3 (about 1/6,000th the density of air at sea level)" - - - Updated - - - huh, link me the full equation and I will try it. Thanks for the read on the XKCD article, it reminded me of a few things that I forgot. Like sputtering. This scenario of course is science fiction, so our counter-top probe has a high tech plasma/magnetic shield from TV, or repulsors for a steady decent for the science of the journey. What is this stokes law? I probably had to learn it in class, but I don't remember what equation peoples names link to. Well, I am off to find out the structure of red and brown dwarfs and see how radically different their density and composition is compared to our sun. I wonder if it is more uniform or still rapidly decreases from the center.

I know a white dwarfs density, I learned that in Astronomy 205. But I am trying to find out where the mass is of a star, and that is my problem! I find it hard to believe that we cant estimate the density zones of our own star then apply that to different types of stars as a theoretical model, or very rough estimates. If, say, 50% of the star's mass was located around the core, then the remaining 50% would be in the rest of the 98% of the volume of the star, and would diminish as it went outwards. Then I could make some rough estimates. But say you have a ship from science fiction that has thermal shielding and radiation shielding, or is a drone, would it be able to explore the "atmosphere" of the sun, and how far down could it "dive" before it hit any meaningful densities that would impair movement?

Well, the first one was average density, which doesn't tell me squat (except that degenerate matter would make better bullets than depleted uranium, but good luck with that) but the second link might be useful. I will read over it tomorrow and see if I can build an equation where I can plug in the density of 1 g/cm3 and 3 g/cm3 and see at what % of radius that it occurs. I assume it is way denser at the core and fluffy at the surface, am I not correct?

I have a question: Density of the material of a star increases as you travel further inward, does it not? Then, how far inwards can you travel before you hit the density of water(1g/cm3)? Rock(2.7g/cm3)? Say you had a spaceship and had to do an "helio" breaking maneuver because you were coming in hot from another star and didn't yet have the tech to hold the fuel for a more conventional breaking maneuver. At what percentage of the star's radius would you hit 1g/cm3? 3g/cm3? Is their a standard equation that I missed that I plug in the star's mass and radius to get a density at a certain altitude? I am wondering for stars like: -Brown Dwarfs -Orange ZAMS -Yellow ZAMS -White ZAMS -Blue ZAMS -Blue Giants -Yellow Giants -Blue Supergiants -Yellow Giants -Red Giants -Yellow Supergiants -Blue Hypergiants -Yellow Hypergiants -Red Supergiants -Red Hypergiants (I think I listed them all in order of standard radius) Hopefully there is an easy equation for this, if not, maybe just for the average/typical star in each category. Thanks!

Same, although my computer froze up during the launch and I had to switch over to my phone, missing the first bit of it! Part count must of been too high. Wish they showed more of the first stage after separation :/

oh dangit my stream froze up just after they announced stage one splashdown! what did i miss? Also, that swirling fuel picture needs to be made into a gif

Hooray I have a picture now! Also, I will set aside more time for KSP, its just that I have been busy with school work recently! I just wanted to say that I am still working on the Pocket Carrier, working on a multi-role frigate with a heavy fighter on a stock moving boom, finished said heavy fighter, and a light fighter. The heavy fighter is under 5 tons, and the light one is under 3! Need to manage part counts, because I can't get the switchable graphics to work on my laptop and an using the stock intel graphics card. Edit: Apparently I don't have a picture. What gives? Edit Again: Apparently profile picture is different than avatar. Got it.

UFO's Spotted! Quick, get the history channel!

Alright, what would it look like if pluto skimmed earth like the mars sized protoplanet did back all those years ago? Would we get a minmus? (also, be great-full that earth decided to store 70% of its crust in a ball 384,000km away! If it hadn't, we might have ended up like Venus, where resurfacing events happen every half billion years or so, plate tectonics (an important part of the water cycle, just look up the subsurface water masses in plate graveyards deep in the mantel) probably wouldn't occur, and we wouldn't exist!)

so when could we expect footage of the landing?

Oh? Ohhhhhh. Please show me! Is it a gimbal where the entire magazine freely rotates, or does it actually stop in place when ready to fire?

Well, maybe I can have a jr docking port it can spin on? All I want is something that can rotate 90 degrees to move something from the center of the ship to outside of it. :/ Thanks for the heads up about the timewarp. Forgot about dannys video where he phases through stuff.

This would be a good addition to the Multi-hulled and Exotic designs thread! Amazing interior! Although I am dissapointed by the lack of bulkheads...

Very neat idea! Looks like a race car. Whats the top speed?