Space space

I’m Seth Shostak, and I’m an astronomer at SETI looking for evidence of E.T. But should we send messages into space? AMA!

I’m Seth Shostak, and I’m an astronomer at SETI looking for evidence of E.T. But should we send messages into space? AMA!My day job includes using a group of radio antennas – the Allen Telescope Array – to listen for signals from extraterrestrials.  For years, some folks have wanted not just listen, but transmit.  Maybe some aliens will reply.  But is transmitting dangerous?  

And what should we say, anyway?

Proof: https://i.redd.it/wn55u76wzc101.jpg

Start time: 1pm PT
I’m Seth Shostak, and I’m an astronomer at SETI looking for evidence of E.T. But should we send messages into space? AMA!

My day job includes using a group of radio antennas – the Allen Telescope Array – to listen for signals from extraterrestrials. For years, some folks have wanted not just listen, but transmit. Maybe some aliens will reply. But is transmitting dangerous?

And what should we say, anyway?

Proof:

Start time: 1pm PT

Put a facility on the far side of the moon. No terrestrial interference.

Paycheck! Are they sending me a paycheck? I don't think so ... But your question is a bit weird. Do you know of any signaling method that's either faster than EM radiation, or that isn't affected by the inverse square law?

That would be nice, if it's possible, but of course we couldn't do much with the blueprints -- no more than sending the blueprints of a laptop to Neanderthals would help

You have a blank cheque for any SETI endeavour you want. What would you do?

Astronomers to Check Mysterious Interstellar Object for Signs of Technology

Astronomers to Check Mysterious Interstellar Object for Signs of Technology

I think that if it is high speed, it gets ablation from striking relatively stationary atoms in it's path. If you have a long and narrow object that is properly oriented, the ablation would only occur at the front end, rather than along the entire side.

Additionally, just for fun, a long thin spacecraft enables you to: 1) Locate sensitive cargo as far as possible from a reactor, 2) Makes it less observable and easier to armor if 1 end is facing hostile observers, 3) Be loaded through a smaller portal into the mothership or small wormholes. 4) Aerodynamic for atmospheric operations. 5) End-over-end centrifugal gravity. 6) Phallic shape.

What if we find out it does have technology but then it just speeds away and we never learn anything more. That would almost be worse than it just being a dumb rock

If nasa said to the American government "we just watched what we thought was a rock in space turn its engines on and fly away" their budget would explode over night.

Loeb ran through the space rock’s peculiarities, particularly its elongated shape, like a cigar or needle—an odd shape for a common space rock, but ideal for a ship cruising through interstellar space.

Is it ideal? I thought aerodynamics didn't matter in space.

New Space Mining Course at Colorado School of Mines

New Space Mining Course at Colorado School of Mines

http://space.mines.edu/

Class of 2018 anyone?

Helium3 harvesting on the moon, Mars prospecting and mining and asteroid mining.

Short to long term goals.

I showed up to class with white gloves and my face painted white.

OH!!! School of MINES!!!

Oh man. If I lived in Colorado I'd totally do this. Space miner is going to be pretty much my only chance to get to space.

That's why it's great to be a helluva engineer

The image on the left was my first picture of Jupiter I've ever taken. The right image is after 6 months of practice. Hope you guys like the progress!

The image on the left was my first picture of Jupiter I've ever taken. The right image is after 6 months of practice. Hope you guys like the progress!

Very impressive improvement here, keep shooting for the stars.

It's so crazy to me that Jupiter is just out there. It's like meeting a celebrity. You see photos and videos all the time you almost forget it's real. And then, there it is. Just like all the photos. Great shot.

The moon of Io

That's exactly how I feel when I see "home-grown" photos like this. It's really there...just sitting there, being all Jupiterish. This massive gas giant, 11 times the size of our planet, and almost inconceivably far away...is right there and you can see it clear as day.

Edit: with a diameter 11 times that of Earth's diameter, and a volume of over 1300 Earths. Thanks everybody for setting me straight. :)

NASA reinventing the wheel.

Looks like it would make a great noodle strainer too

Middle age technology that is now used in space.

Modern metallurgy and material sciences mixed with good old chainmail

how does it perform in loose terrain like sand

Hubble sees galaxy cluster warping space and time (NASA)

Hubble sees galaxy cluster warping space and time (NASA)

It's actually really simple: (1) space is a 3D grid which determines what volume the universe can physically occupy; (2) when you add time, that gives you spacetime which is the 4D fabric of reality; (3) all matter has mass and density values which give rise to gravity; (4) gravity warps the grid lines of spacetime, therefore bending reality and causing the effect of gravitational lensing.

This happens due to the fact that light now has to follow a "curved" path to get from point A to B, just like you would have to curve your pencil to follow the lines of a warped square grid in your notebook (but in 3 dimensions). Note that both space and time are affected by gravity, which displays a fundamental property of general relativity - the fact that distance, motion, and time are all relative to the reference frame of the observer.

Incredible to see a picture like this! I just wish I was smart enough to comprehend the explanation given to the phenomenon.

Still don't get it sorry

TL;DR: https://media.giphy.com/media/sbE79UVgJlS36/giphy.gif

Also see this one and that one.

TL;DR:

Also see this one and that one.

Elon Musk admits he made up the story about launching a roadster to mars.

Elon Musk admits he made up the story about launching a roadster to mars.

Not sure whether to feel stupid for believing that or unhappy it’s not happening.

Hey Elon, April fools is on April 1st, not December 1st.

EDIT: Eric Berger claims that elon still say it's real, less than an hour ago

Elon tweets without denying it

Maybe it's April 1st on Mars.

After 37 years, Voyager has fired up its trajectory thrusters

After 37 years, Voyager has fired up its trajectory thrusters

I have a truck that barely started this morning, and it was running YESTERDAY.

It has, in fact, moved beyond our Solar System into interstellar space.

Well, not exactly. The edge of our solar system isn't well-defined just yet. Instead, it passed through a region of our solar system called the heliopause where solar winds from our Sun and interstellar winds reach an equilibrium. The spacecraft is now in a region of space dominated by interstellar winds, but it is also in a region of space still dominated by the Sun's gravity.

In fact, the Voyager I spacecraft is only 141 AU from the Sun, but the Oort Cloud (a region of space that contains some of the most distant objects still orbiting the Sun) is roughly between 50,000 and 200,000 AU. Voyager I won't reach that milestone for a few hundred thousand years.

Exactly. What kind of thing sits around idle for nearly 4 decades and then just works when you try it out? Nothing you'd buy off the shelf at Wal*Mart, that's for sure.

Got space for this in your back yard?

Got space for in your back yard?

Galileo's 400-year-old theory of free-falling objects passes space test | Science

Galileo's 400-year-old theory of free-falling objects passes space test | Science
Galileo's 400-year-old theory of free-falling objects passes space test | Science

Catholic Church: "Look we apologised for the way we treated Galileo. There's no need to rub our face in his genius."

Didn't Apollo astronauts do this test whilst on the moon? Hammer and a feather if I remember correctly.

I found this newspaper from 1962 in my late grandparents' house in rural NC detailing John Glenn's spaceflight.

I found this newspaper from 1962 in my late grandparents' house in rural NC detailing John Glenn's spaceflight.

"First shalt thou ride the Holy Mercury to the Heavens, then shalt thou count to three, no more, no less. Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number, be reached, then landest thy Holy Friendship 7 of Houston towards thy northern seas, who being awesome in My sight, shall high five it."

I'll try to get clearer pictures to you sometime this week!

Fantastic stuff. Any chance of pics of the article. Would love to read it. I have a thing for old newspaper articles.

My favorite aspect of this paper is how it uses color photography for its cover at a time when most newspapers didn't use color photography all that much.

Try one of these subthreads