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But equal mass does not mean equal density. The moon compressed into a can of soup has equal mass to the real moon but would be far denser.Yes, but as mass increases, so does gravity, and gravity works from the center of the object. So as mass increases, density increases as a result of more gravity pull it in stronger.
Jupiter is almost 11 times the size of Earth, and just under 318 times as massive. However, Earth’s density is significantly higher, since it is a terrestrial planet
Jupiter Compared to Earth - Universe Today
Flat Earth proponents believe that the description of all these planets such as Jupiter as actual worlds is part of a big conspiracy to keep us ignorant of the true nature of our universe. They refer to them as mere representations or reflections on a canopy which encloses our flat Earth.Are you suggesting that Jupiter isn't a planet?
I learn quite a lot from your responses as well. I am not too familiar with the fine nuances of telescopes.Hmmmm. I wasn't aware of that. I learned something new today!
I learn quite a lot from your responses as well. I am not too familiar with the fine nuances of telescopes.
Flat Earth proponents believe that the description of all these planets such as Jupiter as actual worlds is part of a big conspiracy to keep us ignorant of the true nature of our universe. They refer to them as mere representations or reflections on a canopy which encloses our flat Earth.
There's a much bigger space telescope that will launch about the end of next year if they don't delay it any further. It's mirror will be 21 feet, 4 inches. I'm pretty excited to see the kind of pictures it will take!
One explanation I was given is that they use the taxes allocated to the Space programs for personal purposes while claiming it is spent on space exploration.I find it very amusing that flat earthers can't say WHY such a deception is taking place...
One explanation I was given is that they use the taxes allocated to the Space programs for personal purposes while claiming it is spent on space exploration.
In other words all the expenditures on Juno to explore Jupiter is money in their pockets since there is really no Juno probe and no Jupiter as they describe it to explore.
Of course, they have to pay off all the people involved, pay to fake all the rocket launches... Sounds rather expensive... They might not have any money left over to put in their own pockets!
Is that the James Webb?
That's the one! I'm surprised I didn't even mention the name when I was writing about it. I hear it's mostly for infrared observations. I'm not clear on whether it will be able to get images in the visual spectrum like the Hubble does or not. It would sure suck if it didn't. Hubble has been revolutionary! Something 2.5x as big as Hubble would no doubt be a real breakthrough!
So an eight inch diameter mirror is what I have to seek and anything less is not the optimum. Thanx for the useful info!The most important thing to know about telescopes is that the bigger the objective (the lens at the end of a refractor telescope, or the mirror at the bottom of a reflector), the better. It's bigger surface gathers more light from the object you're looking at. About the biggest one you'll find in an easy to use personal scope is around 8". Professional astronomers at observatories use really, really big ones around 200". The mirror on the Hubble space telescope is 7.9 feet in diameter. Being outside the earth's atmosphere helps quite a bit too. There's a much bigger space telescope that will launch about the end of next year if they don't delay it any further. It's mirror will be 21 feet, 4 inches. I'm pretty excited to see the kind of pictures it will take!
That's the one! I'm surprised I didn't even mention the name when I was writing about it. I hear it's mostly for infrared observations. I'm not clear on whether it will be able to get images in the visual spectrum like the Hubble does or not. It would sure suck if it didn't. Hubble has been revolutionary! Something 2.5x as big as Hubble would no doubt be a real breakthrough!
The James Webb Space Telescope (JWST), previously known as Next Generation Space Telescope (NGST), is a part of NASA's ongoing Flagship program. It is under construction and scheduled to launch in October 2018. The JWST will offer unprecedented resolution and sensitivity from long-wavelength (orange-red) visible light, through near-infrared to the mid-infrared (0.6 to 27 micrometers). While the Hubble Space Telescope has a 2.4-meter (7.9 ft) mirror, the JWST features a larger and segmented 6.5-meter-diameter (21 ft 4 in) primary mirror and will be located near the Earth–Sun L2 point. A large sunshield will keep its mirror and four science instruments below 50 K (−220 °C; −370 °F).
JWST's capabilities will enable a broad range of investigations across the fields of astronomy and cosmology.[5] One particular goal involves observing some of the most distant events and objects in the Universe, such as the formation of the first galaxies. These types of targets are beyond the reach of current ground and space-based instruments. Another goal is understanding the formation of stars and planets. This will include direct imaging of exoplanets.
James Webb Space Telescope - Wikipedia
So an eight inch diameter mirror is what I have to seek and anything less is not the optimum. Thanx for the useful info!
BTW
The more they discover the more fascinating astronomy becomes. True about being clear of the interfering atmosphere. That's one reason why observatories are placed on high elevations where there is less atmosphere between outer space and the lens reducing the twinkling star illusion to a very minimum.
Well, that's true when looking at it from the perspective of performance. An 8" scope will weigh around 50 Lbs and can be kind of a pain to deal with to set up and take down. You may be in a situation where that's not very practical. If you already live out in the country, then it wouldn't be so bad. If you're in an apartment in the city, then it wouldn't be very practical unless you could put it in a car and drive out to a location about 15 or 20 miles outside the city to get away from light pollution.
I used to be into Astronomy when I was in my teenage years, but not having a car and relying on my Dad to rarely take me out to a dark sky location got to be too much. The last time I went out to the observatory 25 miles from home was when there was a comet to see. The people managing the scope there weren't even interested enough to stick around until it was completely dark! They were more interested in getting home because of a football game that was supposed to be on TV. Kind of sad! I no longer have my 8" scope. For a very long time, I didn't have anything, but now I have a pair of 7x35mm binoculars. Not much, but they're practical for multiple things. Before I got the 8" scope, I had a pair of 11x80mm binoculars. Those were quite a treat when looking at the sky away from city lights!
That is indeed sad that they were more interested in a football game. Why did they even go in the first place is the question. Kudos to your dad for encouraging you in that area. Not all fathers take such an interest in their children. Some simply bury themselves in the newspaper or watching TV as if their kids didn't exist.
BTW
When you mention driving away from city lights it makes me wonder why I never saw the sky as full of stars as they appear in the Caribbean when I drove in the interstate highway from Massachusetts all the way to Florida. If indeed it is a matter of getting far from cities, why didn't the sky light up with stars?
Actually, I practically had to beg him to take me out to the dark sky location where the observatory was. It was a long drive. It was such a rare thing that we went out there that I ended up giving up, especially after I moved out on my own without a car.
I think the Eastern part of the USA has more light pollution. I'm not sure about the density of city lights in those areas, but I take it that there are more places that have lights between those two points. I live in Wisconsin. We have cities here of course, but it's only about a 20 mile drive to get far enough away to be able to see things like the Milky Way.
The Great Red Spot is a persistent zone of high pressure, producing an anticyclonic storm on the planet Jupiter, 22° south of the equator. It has been continuously observed for 187 years, since 1830. Earlier observations from 1665 to 1713 are believed to have been the same storm; if this is correct, it has existed for more than 350 years.
Great Red Spot - Wikipedia
Well, if the stars are there and I could not see them during that long drive then I guess light pollution maybe accompanied by smog is far more concentrated in the USA East Coast than I would have imagined. People who are born in places where the sky appears to be diamond-studded don't really know just how blessed they are to be gifted with such a splendid view.
I only realized that those stars existed and were visible from Earth without a telescope when I travelled to the Caribbean island of Puerto Rico. Then the whole sky suddenly burst forth as if it all had been secretly hidden. At that time I didn't realize that it was us who had blotted out the stars and imagined it had merely been a matter of geographical location.
One of the things that I find mysterious about Jupiter is that Big Red Spot which seems to remain relatively stable despite all the atmospheric turmoil that surrounds it.
Curious how all these events are going on far from human sight. Sunrises, sunsets, quakes, explosions, storms, comet and asteroid impacts, sulfuric acid and methane rains, etc. All while we sit here totally unaware feeling that we are the center of all creation. Of course I don't doubt that we are important. But it makes one wonder about the purpose for all these things.It's sad that things have gotten to be this way!
There are times when I've been away from a dark sky site for so long that I get amazed by what I see when under a dark sky. Sometimes it's easy to forget.
I think I've heard before that the Great Red Spot has been there for 300 years or so. Now they say it's shrinking. I wonder how long it'll be before it's gone: Jupiter’s red spot is shrinking – here’s why
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