Durabys
A Cheshire Exile
First image of a black hole from the Event Horizon Telescope released
So this is really exciting: Astronomers Worldwide Are About to Make a Groundbreaking Black Hole Announcement Now we've all been burned many times by NASA but given the purpose of the EHT and how much they're playing up the importance, it seems we really will finally see the first photograph of...
forums.spacebattles.com
So this is really exciting:
Astronomers Worldwide Are About to Make a Groundbreaking Black Hole Announcement
Now we've all been burned many times by NASA but given the purpose of the EHT and how much they're playing up the importance, it seems we really will finally see the first photograph of a black hole's event horizon!The European Southern Observatory has just revealed there will be a huge announcement next week. Yes, we know how that sounds - but as far as we can tell, it appears the world is about to finally see the first ever photo of a black hole's event horizon. Of course, we won't know for sure until the press event itself, which we will cover live on our site. But here's a massive clue: according to the advance statement, the researchers will be discussing the "first result from the Event Horizon Telescope."
Now something is finally ready. On 10 April 2019, at 15:00 CEST (13:00 UTC, 9:00 EST) the European Commission, European Research Council, and the Event Horizon Telescope (EHT) project will present results they are describing as "groundbreaking". As they note, "due to the importance of this result, we encourage satellite events in the different ESO Member States and beyond."
So mark your calendars and tune into the youtube livestream April 10, 9:00 EST!
Permission to Squee granted!
First image of the black hole in the galaxy M87!
Two things, the black hole is 50 micro-arc seconds across, which makes it one of the smallest by apparent size if not the smallest object we've ever imaged.
It's also almost a monster.
Courtesy of xkcd.
It begins!
PS: Please give Likes on that thread to those first four posters and no me. Thank you.
PPS: Calling @Vorpal for the following question asked on that thread:
Actually, it is based entirely on the rocket equation. Anything that is within the event horizon cannot escape the black hole under its own energy, because the escape velocity from that point is the speed of light. That is all there is to it. With a black hole the size of this one, the force of gravity at the event horizon can be low as 1g.
So if you had a bussard ramjet that could survive the heat of the accretion disk, you could dip bellow the event horizon of a massive black hole like this one, and then climb back out. You'd just need to push out multiple times the mass of your space ship in propellant to escape the gravity well completely.
Blowing the Vorpal horn.
Doomsought: You're wrong, as many others have already stated. But try looking at it this way:
No particle with mass can ever reach the speed of light, as it will required an infinite amount of energy to do so.
At the event horizon of a black hole, not even the mass-less photon - moving at light speed - can escape the influence of gravity.
Any sort of reaction-based propulsion system can only impart finite amounts of energy.
Therefore, no propulsion system will suffice to impart the infinite amount of energy anything with mass would require to reach luminal velocity and escape from the event horizon, nevermind the transfinite amount of energy required to escape from below it.
Actually, it is based entirely on the rocket equation. Anything that is within the event horizon cannot escape the black hole under its own energy, because the escape velocity from that point is the speed of light. That is all there is to it. With a black hole the size of this one, the force of gravity at the event horizon can be low as 1g.
So if you had a bussard ramjet that could survive the heat of the accretion disk, you could dip below the event horizon of a massive black hole like this one, and then climb back out. You'd just need to push out multiple times the mass of your space ship in propellant to escape the gravity well completely.
Guys and Gals. Vorpal is not coming. At least not fast. He is spending a lot of time on Frozen In Carbonite. Yet another one of SB's sister sites. I am making a thread there.