56, Kingston, New Jersey
Bring back samples?Wow, what an undertaking...
Especially, if they don't like the samples and want to return them.
Wasn't that awesome, slowed it down and landed it without breaking anything.'Bang,Zoom.. To Mars Alice, to Mars'
Before I pass judgement, I'll wait until I see what they learn & bring back.
Would it not be nice when NASA could fix Texas ? Still very good work from Nasa.
How long before some dickhead posts a youtube video which proclaims it is all fake
Well, here's something we never saw before. Sunset on Mars;
Click on the image and a larger photo will appear... uh-may-zing!
Fiery rose and peach sunset skies are a unique perk of our home on Earth. But what colors appear when the sun sets on other planets in the solar system?The answer depends on the planet. On Mars, the sun comes and goes with a blue glow. On Uranus, the sunset sky transitions from blue to turquoise, according to NASA. And on Titan, one of Saturn's moons, the sky turns from yellow to orange to brown as the sun dips beneath the horizon. Sunset colors aren't uniform because, in large part, these hues are a product of each planet's atmosphere and how the particles in it scatter sunlight, according to Kurt Ehler, a professor of mathematics at Truckee Community College in Reno, Nevada, and lead author of a 2014 paper in the journal Applied Optics that investigated why the Martian sunset appears blue. "It’s tricky," Ehler told Live Science. "Everyone had a preconceived notion that the mechanism [for sunsets] is a replication of what we see on Earth." But that’s not the case. On Earth, the atmosphere is made up of tiny gas molecules, largely nitrogen and oxygen, which are more effective at scattering — that is absorbing and re-emitting in a different direction — short wavelength light, like blue and violet, than it is longer red wavelengths. The selective type of scattering caused by small molecules is called Rayleigh scattering. It gives us a blue sky at midday, but at sunset and sunrise, when the sunlight must travel farther, more of the blue light gets scattered away; it’s the longer red and yellow wavelengths that reach our line of sight, creating the vibrant shades of red that we see. Any planet whose atmosphere is dominated by gas will follow a similar pattern of longer wavelength-colors becoming more dominant at sunset, Ehler said. On Uranus, for instance, the gas particles of hydrogen, helium and methane in its atmosphere scatter the blue and green shorter wavelengths while absorbing (but largely not re-emiting) longer red wavelengths, according to NASA. This creates a bright blue sky that turns turquoise at sunset as blue light is scattered away relative to the longer, greenish wavelengths. If a planet's atmosphere is dominated by something other than gases, everything about how the sunset appears is going to be different. Take the blue Martian sunset. "The density of atmospheric gas is only about 1/80 of what it is here," Ehler said of Mars. "The scattering is dominated by larger particles of dust." In a 2014 study that used data from the Mars rover Spirit, Ehler and his colleagues found that Martian dust scatters light very differently than gas molecules do. "The reason for blue sunset is the pattern in which light scatters off those particles," he said.Gas molecules, like the ones here on Earth, scatter light in every direction. In contrast, dust scatters light primarily in one direction — the forward direction, Ehler said. What's more, dust particles scatter red light at much wider angles than blue light does. Because the blue light isn’t scattered very widely, it becomes more concentrated, so "the blue light is about six times as intense as the red light" on Mars, Ehler said.When you look at the Martian sunset, you actually see that "the disk of the sun is white, because light doesn't change color as it passes through the Martian atmosphere," Ehler said "Around the sun there’s a bluish glow. And further out, the sky starts looking reddish. There, you’re seeing red lights scattered at larger angles." As for the other planets and moons, it’s nearly impossible to predict how the sunset will look without having a thorough understanding of their atmospheric composition. If these celestial bodies have a gaseous atmosphere, you’d expect to start seeing longer wavelengths of light at sunset, Ehler said...
Amazing.I have my own theory.
Really ? Is it named after you ?
if it takes 7 months to get to mars and 7 months to get back ,,,then where is all the fuel coming from ,,i wonder ,,,
I wonder how much has been learned and NOT told to us. My guess is they know much more than we've been told.
e - I'm no expert on this topic, but I think most of the fuel is used to get out of earth's gravity. Once you are traveling in a direction at a certain speed, it doesn't cost much fuel no matter how long it takes to get there. You just have to avoid the gravitational pull of other large objects and being hit by an asteroid. There's no large objects between Earth and Mars.Once you are at Mars, the key is to maintain an ideal orbit range. If you pick the right distance, that doesn't take much fuel either.U - you and I are paying for the project. My guess is, that they would honestly answer just about any question you would ask them, without giving you, or our enemies, the ability to make your own rocket.
As an update, NASA released video of the rover landing, as well as photos from the surface;https://www.youtube.com/watch?v=HS1CWAkbRu0
Any evidence of life ever?
Not to my knowledge so far. But, that would come with the samples they get back.If there is life, it would probably be microscopic and in the soil and/or ice.
chatillion
Bring back samples?
Feb 18Wow, what an undertaking...
JimNastics
Especially, if they don't like the samples and want to return them.
Feb 18hpylady_
Wasn't that awesome, slowed it down and landed it without breaking anything.
Feb 19'Bang,Zoom.. To Mars Alice, to Mars'
JimNastics
Before I pass judgement, I'll wait until I see what they learn & bring back.
Feb 19FLYJAMES
Would it not be nice when NASA could fix Texas ?
Feb 19Still very good work from Nasa.
rizlared
How long before some dickhead posts a youtube video which proclaims it is all fake
Feb 19JimNastics
Well, here's something we never saw before. Sunset on Mars;
chatillion
Click on the image and a larger photo will appear... uh-may-zing!
Feb 19JimNastics
Feb 19Fiery rose and peach sunset skies are a unique perk of our home on Earth. But what colors appear when the sun sets on other planets in the solar system?
The answer depends on the planet. On Mars, the sun comes and goes with a blue glow. On Uranus, the sunset sky transitions from blue to turquoise, according to NASA. And on Titan, one of Saturn's moons, the sky turns from yellow to orange to brown as the sun dips beneath the horizon.
Sunset colors aren't uniform because, in large part, these hues are a product of each planet's atmosphere and how the particles in it scatter sunlight, according to Kurt Ehler, a professor of mathematics at Truckee Community College in Reno, Nevada, and lead author of a 2014 paper in the journal Applied Optics that investigated why the Martian sunset appears blue.
"It’s tricky," Ehler told Live Science. "Everyone had a preconceived notion that the mechanism [for sunsets] is a replication of what we see on Earth." But that’s not the case.
On Earth, the atmosphere is made up of tiny gas molecules, largely nitrogen and oxygen, which are more effective at scattering — that is absorbing and re-emitting in a different direction — short wavelength light, like blue and violet, than it is longer red wavelengths. The selective type of scattering caused by small molecules is called Rayleigh scattering. It gives us a blue sky at midday, but at sunset and sunrise, when the sunlight must travel farther, more of the blue light gets scattered away; it’s the longer red and yellow wavelengths that reach our line of sight, creating the vibrant shades of red that we see.
Any planet whose atmosphere is dominated by gas will follow a similar pattern of longer wavelength-colors becoming more dominant at sunset, Ehler said. On Uranus, for instance, the gas particles of hydrogen, helium and methane in its atmosphere scatter the blue and green shorter wavelengths while absorbing (but largely not re-emiting) longer red wavelengths, according to NASA. This creates a bright blue sky that turns turquoise at sunset as blue light is scattered away relative to the longer, greenish wavelengths.
If a planet's atmosphere is dominated by something other than gases, everything about how the sunset appears is going to be different. Take the blue Martian sunset. "The density of atmospheric gas is only about 1/80 of what it is here," Ehler said of Mars. "The scattering is dominated by larger particles of dust."
In a 2014 study that used data from the Mars rover Spirit, Ehler and his colleagues found that Martian dust scatters light very differently than gas molecules do. "The reason for blue sunset is the pattern in which light scatters off those particles," he said.
Gas molecules, like the ones here on Earth, scatter light in every direction. In contrast, dust scatters light primarily in one direction — the forward direction, Ehler said. What's more, dust particles scatter red light at much wider angles than blue light does. Because the blue light isn’t scattered very widely, it becomes more concentrated, so "the blue light is about six times as intense as the red light" on Mars, Ehler said.
When you look at the Martian sunset, you actually see that "the disk of the sun is white, because light doesn't change color as it passes through the Martian atmosphere," Ehler said "Around the sun there’s a bluish glow. And further out, the sky starts looking reddish. There, you’re seeing red lights scattered at larger angles."
As for the other planets and moons, it’s nearly impossible to predict how the sunset will look without having a thorough understanding of their atmospheric composition. If these celestial bodies have a gaseous atmosphere, you’d expect to start seeing longer wavelengths of light at sunset, Ehler said...
LaFonda
Amazing.
Feb 20I have my own theory.
JimNastics
Really ? Is it named after you ?
Feb 23edison324
if it takes 7 months to get to mars and 7 months to get back ,,,then where is all the fuel coming from ,,i wonder ,,,
Feb 23UnFayzed
I wonder how much has been learned and NOT told to us. My guess is they know much more than we've been told.
Feb 23JimNastics
e - I'm no expert on this topic, but I think most of the fuel is used to get out of earth's gravity. Once you are traveling in a direction at a certain speed, it doesn't cost much fuel no matter how long it takes to get there. You just have to avoid the gravitational pull of other large objects and being hit by an asteroid.
Feb 23There's no large objects between Earth and Mars.
Once you are at Mars, the key is to maintain an ideal orbit range.
If you pick the right distance, that doesn't take much fuel either.
U - you and I are paying for the project. My guess is, that they would honestly answer just about any question you would ask them, without giving you, or our enemies, the ability to make your own rocket.
JimNastics
As an update, NASA released video of the rover landing, as well as photos from the surface;
Feb 25https://www.youtube.com/watch?v=HS1CWAkbRu0
UnFayzed
Any evidence of life ever?
Feb 25JimNastics
Not to my knowledge so far.
Feb 25But, that would come with the samples they get back.
If there is life, it would probably be microscopic and in the soil and/or ice.