Space In General

[G.T.Ace]

WOW, amazing picture! 👍

 

[sumbrownkid]

"No, no, light speed is too slow!"
"Light speed too slow, sir?"

Our radar has been jammed!

 

[PzR Slim]

Thanks Dennis & Ace.

Scope is a Skywatcher 250 PDS on an NEQ6Pro mount guided with phd via a webcam attached to the finder scope. Image was taken with a Canon 1100D and comprises of 68 x 60" lights at ISO 800, 10 darks and 20 flats. Stacked in DSS and processed in PS.

 

[nealcropper]

That pic is absolutely beatifull. I hope to see more from you.

 

[CodeRedR51]

More please!

 

[CodeRedR51]

Space-X "Grasshopper" takeoff and landing.

 

[homeforsummer]

Thanks Dennis & Ace.

Scope is a Skywatcher 250 PDS on an NEQ6Pro mount guided with phd via a webcam attached to the finder scope. Image was taken with a Canon 1100D and comprises of 68 x 60" lights at ISO 800, 10 darks and 20 flats. Stacked in DSS and processed in PS.

How did you get such a shot in "heavy light pollution"? I'd have though it impossible, even with plenty of equipment and good PP.

 

[PzR Slim]

How did you get such a shot in "heavy light pollution"? I'd have though it impossible, even with plenty of equipment and good PP.

I use an Astronomik EOS Clip filter in my DSLR. This does a good job of blocking the particular wavelengths given out by typical street lights but obviously there is no substitute for really dark skies.

Couple of people asked to see more. I've been photographing space for less than a year and the pic above is by far my best but I'll post a few pics in chronological order to give you some idea of the improvements I've made.

 

[CodeRedR51]

Nice! Have you tried getting anything closer like Mars or Mercury?

 

[G.T.Ace]

 

[nealcropper]

I use an Astronomik EOS Clip filter in my DSLR. This does a good job of blocking the particular wavelengths given out by typical street lights but obviously there is no substitute for really dark skies.

Couple of people asked to see more. I've been photographing space for less than a year and the pic above is by far my best but I'll post a few pics in chronological order to give you some idea of the improvements I've made.

Could you tell me what the 2nd and fourth pics are?

 

[Encyclopedia]

2nd one: Andromeda?

 

[PeterJB]

2nd one: Andromeda?

Whirlpool Galaxy.

 

[Emptyone]

Looks like the Chinese have done some good work establishing the speed of gravity. Turns out you can infer from experiments that it is the speed of light as the results cluster around that speed and it's within the error bounds. You can download the paper too, to see what they did. Pretty neat stuff.

 

[homeforsummer]

I use an Astronomik EOS Clip filter in my DSLR. This does a good job of blocking the particular wavelengths given out by typical street lights but obviously there is no substitute for really dark skies.

Thanks for the info 👍 I never knew such a filter existed. I'm usually discouraged enough by light pollution to not bother looking into it Luckily I live within reasonable distance of some very dark skies, so all I really have to worry about is cloud cover...

Excellent photos by the way 👍

 

[PzR Slim]

Could you tell me what the 2nd and fourth pics are?

Second is M51 the Whirpool Galaxy, as someone pointed out. Will be having another crack at it soon as I've got more experience to do it justice. Fourth one is M27, the Dumbell Nebula or Apple Core Nebula.

 

[Crispy]

So with the Speed of Gravity having the possibility of being the Speed of Light, does that indicate that gravity may in fact be a particle?

 

[Shoe67]

Not just a particle, but a changeable particle.

 

[nealcropper]

So with the Speed of Gravity having the possibility of being the Speed of Light, does that indicate that gravity may in fact be a particle?

I wouldn't have thought that gravity travelled at all. I thought it was a force that made things travel at any given speed, I must have been wrong all this time.

Can someone explain to me how a force can be measured in speed? Or even if gravity isn't a force at all? I need clarification guys!

 

[Crispy]

I wouldn't have thought that gravity travelled at all. I thought it was a force that made things travel at any given speed, I must have been wrong all this time.

Can someone explain to me how a force can be measured in speed? Or even if gravity isn't a force at all? I need clarification guys!

I believe, and I'm not 100% sure, but the speed indicates that it may actually not be a force, but a particle that causes attraction between objects. This particle only shows up in objects with mass. It gets attracted to the same particles in other objects. Since it is a particle, it may be massless or very close to, therefore it travels at or just less than the Speed of Light.

I'm probably wrong, but I tried!

 

[PzR Slim]

I wouldn't have thought that gravity travelled at all. I thought it was a force that made things travel at any given speed, I must have been wrong all this time.

Can someone explain to me how a force can be measured in speed? Or even if gravity isn't a force at all? I need clarification guys!

They are fairly close to proving that the Higgs boson is the particle responsible for giving matter mass. Gravity is just the effect that mass has on space time. All particles are limited to the cosmic speed limit, namely the speed of light. So therefore if gravity is just the effect mass has on space time and a particle is what gives matter mass it follows that gravity will be limited to the same cosmic speed limit. That's my thinking on it anyway.

 

[nealcropper]

I believe, and I'm not 100% sure, but the speed indicates that it may actually not be a force, but a particle that causes attraction between objects. This particle only shows up in objects with mass. It gets attracted to the same particles in other objects. Since it is a particle, it may be massless or very close to, therefore it travels at or just less than the Speed of Light.

I'm probably wrong, but I tried!

If its a particle, how would it cause attraction between two other particles? Magnetic attraction?

They are fairly close to proving that the Higgs boson is the particle responsible for giving matter mass. Gravity is just the effect that mass has on space time. All particles are limited to the cosmic speed limit, namely the speed of light. So therefore if gravity is just the effect mass has on space time and a particle is what gives matter mass it follows that gravity will be limited to the same cosmic speed limit. That's my thinking on it anyway.

So if gravity is an effect on space/time, how can it have a speed, as it doesn't really move, it's just there?

I may be way off with either comment. I just like knowing this stuff.

 

[PzR Slim]

If its a particle, how would it cause attraction between two other particles? Magnetic attraction?

So if gravity is an effect on space/time, how can it have a speed, as it doesn't really move, it's just there?

I may be way off with either comment. I just like knowing this stuff.

Just in the same way that any electromagnetic wave has a finite speed. A magnetic field around a magnet is just there but the electromagnetic wave associated with magnetism does travel at the speed of light.

 

[nealcropper]

So does that make gravity a "version" of electromagnetism?

 

[Dan_]

Space-X "Grasshopper" takeoff and landing.

It's like a building taking off and landing with no fuss, awesome. 👍

I really hope that SpaceX succeeds with the Grasshopper program, even if the vehicle can only be reused for 10 or so times, it would represent a complete revolution on the way we do science and explore space.

 

[CodeRedR51]

I like SpaceX because they are thinking outside the box. In fact they want to send men to Mars before NASA.

Kudos to them.

 

[CodeRedR51]

Sorry for the DP.

First Alien Earth likely to be found in 2013

...And there are probably many alien Earths out there to be found in our Milky Way galaxy, researchers say.

"Estimating carefully, there are 200 billion stars that host at least 50 billion planets, if not more," Mikko Tuomi, of the University of Hertfordshire in England, told SPACE.com via email.

"Assuming that 1:10,000 are similar to the Earth would give us 5,000,000 such planets"...

 

[Shoe67]

How do they make a 1:10,000 assumption???

 

[Emptyone]

They are fairly close to proving that the Higgs boson is the particle responsible for giving matter mass. Gravity is just the effect that mass has on space time. All particles are limited to the cosmic speed limit, namely the speed of light. So therefore if gravity is just the effect mass has on space time and a particle is what gives matter mass it follows that gravity will be limited to the same cosmic speed limit. That's my thinking on it anyway.

The Higgs gives the basic building blocks mass, such as quarks. The 'mass' of a proton for example is mostly made up of the interactions of the quarks via the strong force, which create a load of energy via QCD. I realise I'm terrible at explaining this, so here's a better explanation from reddit. Then there is also this paper I found whilst looking at this a bunch of time ago. Basically most of the mass of particles like Protons and Neutron's is not due to the Higgs. Less than 5% in fact.

Also, energy warps spacetime, not mass. And I think gravity propagates as a wave at the speed of light. So if you say you took the Sun out of the Solar system, just like you wouldn't notice on Earth that it hasn't gone out for 8 minutes, the Earth would still be orbiting the Sun for 8 minutes whilst it isn't there, because the effects of gravity are not instantaneous. Hope that helps (and is correct )

And nealcopper, it just means gravity sticks to the universal speed limit, as it has to, like electromagnetic waves have to.

 

[Antmeg26]

How do they make a 1:10,000 assumption???

They are assuming we do not think they are guessing... Fairly generous margin...awfully lonely if it just us... All the more reason to look after what we have...I am going for a spin in my v8 following that