Aliens anyone?

[Z.O.R.G.]

Radars tracking activity in "deep space" will help the UK protect itself from "space warfare", the defence secretary has said.

It marks a "new phase" of a security arrangement between the UK, US and Australia by 2030 - known as AUKUS.

The Ministry of Defence said radars will enable nations to identify objects in deep space, up to 22,000 miles (36,000 km) away from earth.

AUKUS: Radars will help counter threat of 'space warfare' (bbc.com)

22k miles just happens to be geosynchronous orbit (I had to look it up, I thought it wasn't that high).

[NT2C]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

[Z.O.R.G.]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

[MacWa77ace]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

I was thinking, "have those guys never watched an episode of Star Trek?"

But then realized they were just identifying 22k miles as "deep space".

We need to move deep space out to at least the dark side of the moon to be effective.

[flybynight]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

I was thinking, "have those guys never watched an episode of Star Trek?"

But then realized they were just identifying 22k miles as "deep space".

We need to move deep space out to at least the dark side of the moon to be effective.

I think deep space is beyond the Kuiper Belt

[MacWa77ace]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

I was thinking, "have those guys never watched an episode of Star Trek?"

But then realized they were just identifying 22k miles as "deep space".

We need to move deep space out to at least the dark side of the moon to be effective.

I think deep space is beyond the Kuiper Belt

Well now we're getting somewhere!

Kuiper Belt
Oort Cloud or
Heliousphere?

[flybynight]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

I was thinking, "have those guys never watched an episode of Star Trek?"

But then realized they were just identifying 22k miles as "deep space".

We need to move deep space out to at least the dark side of the moon to be effective.

I think deep space is beyond the Kuiper Belt

Well now we're getting somewhere!

Kuiper Belt
Oort Cloud or
Heliousphere?

I believe  the distinction is ,anything beyond  the Kuiper Belt is considered interstellar

[MacWa77ace]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

I was thinking, "have those guys never watched an episode of Star Trek?"

But then realized they were just identifying 22k miles as "deep space".

We need to move deep space out to at least the dark side of the moon to be effective.

I think deep space is beyond the Kuiper Belt

Well now we're getting somewhere!

Kuiper Belt
Oort Cloud or
Heliousphere?

I believe  the distinction is ,anything beyond  the Kuiper Belt is considered interstellar

Yep, the Heliopause is the demarcation line into 'interstellar space' I believe. But where does 'deep space' start? Even thought the UK goes with geostationary orbit distances as 'deep' LOL.  I'm going with the 'old learning' [pre 2018]. May the farce be with you.

[NT2C]

I'm going to posit that the demarcation line for the beginning of _deep space should be the halfway distance to the nearest star other than Sol.

[Z.O.R.G.]

So that's about 2 light years.  4 years for a radar ping to get there and back.  

[MacWa77ace]

I'm going to posit that the demarcation line for the beginning of _deep space should be the halfway distance to the nearest star other than Sol.

Yeah, should be where there is absolutely no gravity effect from SOL. But I'm ok with beyond the effect of SOL's solar winds, technically.

So that's about 2 light years.  4 years for a radar ping to get there and back. 

They're going to have to use 'subspace' radar, or to Trekkies 'long range sensors'. Subspace transmissions are instantaneous relative to the sender.

[majorhavoc]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

I was thinking, "have those guys never watched an episode of Star Trek?"

But then realized they were just identifying 22k miles as "deep space".

We need to move deep space out to at least the dark side of the moon to be effective.

I think deep space is beyond the Kuiper Belt

Well now we're getting somewhere!

Kuiper Belt
Oort Cloud or
Heliousphere?

I vote heliousphere.  Deep space begins when our solar system ends.

[NT2C]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

I was thinking, "have those guys never watched an episode of Star Trek?"

But then realized they were just identifying 22k miles as "deep space".

We need to move deep space out to at least the dark side of the moon to be effective.

I think deep space is beyond the Kuiper Belt

Well now we're getting somewhere!

Kuiper Belt
Oort Cloud or
Heliousphere?

I vote heliousphere.  Deep space begins when our solar system ends.

Nah, in nautical reference that's like the 12 mile offshore limit. We're looking for the space equivalent of the 200 mile economic exclusion zone.

[majorhavoc]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

I was thinking, "have those guys never watched an episode of Star Trek?"

But then realized they were just identifying 22k miles as "deep space".

We need to move deep space out to at least the dark side of the moon to be effective.

I think deep space is beyond the Kuiper Belt

Well now we're getting somewhere!

Kuiper Belt
Oort Cloud or
Heliousphere?

I vote heliousphere.  Deep space begins when our solar system ends.

Nah, in nautical reference that's like the 12 mile offshore limit. We're looking for the space equivalent of the 200 mile economic exclusion zone.

In that case, however the Ferengi define it.

[MacWa77ace]

In that case, however the Ferengi define it.

Hey, are they the 'deep space' equivalent of China? Or the Knights Templar? Or the Meddici?

[majorhavoc]

In that case, however the Ferengi define it.

Hey, are they the 'deep space' equivalent of China? Or the Knights Templar? Or the Meddici?

I could answer that question, but I don't see the profit in it.

[DarkAxel]

Yeah, whoever decided that was deep space probably also thinks 4" is more than big enough.

I was thinking, "have those guys never watched an episode of Star Trek?"

But then realized they were just identifying 22k miles as "deep space".

We need to move deep space out to at least the dark side of the moon to be effective.

I think deep space is beyond the Kuiper Belt

Well now we're getting somewhere!

Kuiper Belt
Oort Cloud or
Heliousphere?

I think once you hit the interstellar medium you are in outer space, and past the Oort cloud should be considered deep space, as it has objects in it that are almost 1 1/2 light years from the sun. Inside the heliopause should be considered inner space. IMHO anyway.

[flybynight]

I'm too lazy to go back for the quote. But it said beyond the Kuiper belt , Sol gravity is equal to  the next nearest stars. 


Halfway to  Proxima Centauri ?  That's about 40,000 years  to get there using current space vehicles. 

[MacWa77ace]

The spherical Oort Cloud, is in orbit around SOL, and most of it is beyond the Kuiper Belt. So SOL's gravitational influence is out beyond 200,000 AU

The 'equal gravity' point would be calculated by obtaining the total mass of both solar systems, and the distance. And would only be at a point halfway if both systems total mass was equal. Otherwise It would be closer to the smaller massed system.

[flybynight]

" The Kuiper belt and Neptune may be treated as a marker of the extent of the Solar System, alternatives being the heliopause and the distance at which the Sun's gravitational influence is matched by that of other stars (estimated to be between 50000 AU and 125000 AU)."