Question about space? Ask Jeph!
This video was created by Benjamin Higginbotham on August 14, 2009
Posted in: Video
If you have a question about anything space related, how does a SRB work, will our sun ever become a black hole, how do you pee in space? Ask your question in our comments here or on Spacevidcast and if you’re question is of the awesome variety, he will answer it!
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[..YouTube..] …..
…..
[..YouTube..] LOL!!!!
LOL!!!!
[..YouTube..] Micro piss comets.
Micro piss comets.
[..YouTube..] What mas does an object need to have to become a black hole?
When an object does become black hole does the range of it’s gravity well grow or remain the same?
What mas does an object need to have to become a black hole?
When an object does become black hole does the range of it’s gravity well grow or remain the same?
[..YouTube..] According to theory, there is no minimum. But that’s why the Large Hadron Collider exists. To see if that’s actually true, basically.
The gravity well stays the same. if the sun became a black hole, it would be dark, but we wouldn’t notice a change in the gravity of it. The orbital mechanics essentially remain the same, until something gets to it’s event horizon. Great questions!
Jeph,
Hope you don’t mind my putting in my two cents worth.
The minimum theoretical mass for a black hole is the Planck Mass. This is approximately 0.000000018 kg. See the book An Introduction to Astrophystics by B.W. Carroll and D. A. Ostlie on page 1034
I remember this because I had to derive the equation for finding it on my final exam in Galactic Astronomy and Cosmology.
Regards,
Rick Boozer
Hi Jeph,
I messed up my HTML on my previous post, so I’m reposting.
Hope you don’t mind my putting in my two cents worth.
The minimum theoretical mass for a black hole is the Planck Mass. This is approximately 0.000000018 kg. See the book An Introduction to Astrophystics by B.W. Carroll and D. A. Ostlie on page 1034
I remember this because I had to derive the equation for finding it on my final exam in Galactic Astronomy and Cosmology.
Regards,
Rick Boozer
According to theory, there is no minimum. But that’s why the Large Hadron Collider exists. To see if that’s actually true, basically.
The gravity well stays the same. if the sun became a black hole, it would be dark, but we wouldn’t notice a change in the gravity of it. The orbital mechanics essentially remain the same, until something gets to it’s event horizon. Great questions!
[..YouTube..] First Question:
Answer:
A mass of a Blue Supergiant Star.
First Question:
Answer:
A mass of a Blue Supergiant Star.
…Duh, Jeph, I have a question:
Q: How much ground can a groundhog grind if a groundhog could grind ground?
Extra Credit: What was the Augustine Report’s take on this important question?
On that note, are Brussels Sprouts actually from Belgium? And if so, has ESA ever created space-worthy versions of this horrible vegetable?
[..YouTube..] 3 times that of the sun.
No, the range remains the same.
3 times the mass of the sun is around the minimum mass of a black hole formed by a star that has gone supernova. But there are many more ways to form a black hole than from the death of a star. Again, as I stated earlier, the true possible minimum of a black hole mass is the Planck Mass.
The Large Hadron Collider was primarily built in pursuit of the Higgs Boson AKA the “God Particle” that causes other particles to have mass. However, as Jeph’s comment indicates, small black holes may be formed that have a mass no smaller than the Planck mass with this machine. That is another thing that scientists are hoping to see since black holes that small have been predicted but never have been observed.
3 times that of the sun.
No, the range remains the same.
[..YouTube..] Since the moon’s period of rotation is equal to its orbital period, how were the Apollo astronauts able to film ‘Earth rise” on the moon?
Since the moon’s period of rotation is equal to its orbital period, how were the Apollo astronauts able to film ‘Earth rise” on the moon?
[..YouTube..] I’ve been asking since I was 7 years old. What exactly is responsible for the moon having the same period of rotation as its period of orbit?
I’ve been asking since I was 7 years old. What exactly is responsible for the moon having the same period of rotation as its period of orbit?
[..YouTube..] OK, you’re on the space ship Discovery from 2001 a space odyssey. You are jogging around the main deck which is a wheel that turns to create artificial gravity. If you run in the opposite direction to the turning of the wheel so as to become stationary relative to the wheel, would you lose centrifugal force and become weightless in an otherwise artificial gravity environment?
OK, you’re on the space ship Discovery from 2001 a space odyssey. You are jogging around the main deck which is a wheel that turns to create artificial gravity. If you run in the opposite direction to the turning of the wheel so as to become stationary relative to the wheel, would you lose centrifugal force and become weightless in an otherwise artificial gravity environment?
[..YouTube..] Do you get headaches in space? Is it true if you had previous surgery the G force of the shuttle could make things “uncomfortable” ?
Do you get headaches in space? Is it true if you had previous surgery the G force of the shuttle could make things “uncomfortable” ?
[..YouTube..] What is the average weight of an unladen African Swallow, assuming it is not carrying a coconut by the husk in it’s talons, while flying North.
What is the average weight of an unladen African Swallow, assuming it is not carrying a coconut by the husk in it’s talons, while flying North.
[..YouTube..] can i build a rocket and shoot myself into space ?
but in a safe way ofcourse :p not that i’ve the knowledge ^^
would they arest me for building a weapon of mass destruction ?
can i build a rocket and shoot myself into space ?
but in a safe way ofcourse :p not that i’ve the knowledge ^^
would they arest me for building a weapon of mass destruction ?
[..YouTube..] I’ve been seeing a few questions about Luna, so I think I’ll answer them all in one upcoming podcast. These are really great questions! Thank you!
I’ve been seeing a few questions about Luna, so I think I’ll answer them all in one upcoming podcast. These are really great questions! Thank you!
[..YouTube..] I would think so, yes. It would sort of be like creating a whirlpool in a bucket. once you stop spinning the water, it loses the convex indentation, and returns to a relatively flat surface. I think something similar would happen in your example, but instead of returning to a position of rest, the runner would just become weightless once he matched the speed of rotation.
I would think so, yes. It would sort of be like creating a whirlpool in a bucket. once you stop spinning the water, it loses the convex indentation, and returns to a relatively flat surface. I think something similar would happen in your example, but instead of returning to a position of rest, the runner would just become weightless once he matched the speed of rotation.
[..YouTube..] 15 grams, apparently, or about the weight of 14 Bic pen caps.
15 grams, apparently, or about the weight of 14 Bic pen caps.
[..YouTube..] You’d have to deal with the red tape known as ITAR. I feel it’s better to beg forgiveness than ask permission in the situation you are asking about.
But I’m not responsible for anyone’s actions in this scope!!
You’d have to deal with the red tape known as ITAR. I feel it’s better to beg forgiveness than ask permission in the situation you are asking about.
But I’m not responsible for anyone’s actions in this scope!!
[..YouTube..] Concerning the Lorenz transformations, or whatever is responsible for the physical contraction of objects in the direction of their motion. If two bowling balls, one metre apart, accelerated through space to 99% the speed of light one being in front of the other would the space between them diminish along with their physical girth? Would the objects get closer together simply by travelling in the same direction?
Concerning the Lorenz transformations, or whatever is responsible for the physical contraction of objects in the direction of their motion. If two bowling balls, one metre apart, accelerated through space to 99% the speed of light one being in front of the other would the space between them diminish along with their physical girth? Would the objects get closer together simply by travelling in the same direction?
[..YouTube..] If the formation of planetary systems are a natural outcome of star formation and similar forces are responsible for the formation of moons, why is it the case that there are no naturally formed satellites around any moons? Why dont moons have moons?
If the formation of planetary systems are a natural outcome of star formation and similar forces are responsible for the formation of moons, why is it the case that there are no naturally formed satellites around any moons? Why dont moons have moons?
If Mars had oil in the ground like Earth, Would we be able to use it on Mars like we do on Earth
Your doing a great job Jeph *wink*
[..YouTube..] is there a white hole on the other side of a black hole or nothing at all?
is there a white hole on the other side of a black hole or nothing at all?
[..YouTube..] My guess is that the gravity from the host planet would eventually cause the moon’s satellite to be knocked out of its orbit, either sending it into the moon, or pulling it down to the planet’s surface or even possibly its own orbit.
My guess is that the gravity from the host planet would eventually cause the moon’s satellite to be knocked out of its orbit, either sending it into the moon, or pulling it down to the planet’s surface or even possibly its own orbit.
[..YouTube..] It’s all theory for now, but in my opinion, I’d assume that it’s a white hole.
It’s all theory for now, but in my opinion, I’d assume that it’s a white hole.
is the world gonna end in 2012?
Nope. even NASA has explained why. The galactic center, the sun and the earth align every year on the same date. nothing special in 2012. There’s no such planet as Niburu. Look up the probe Ulysses for proof.
What are the chances that we will ever colonize on the moon or mars? Living in such extreme environments cant be good for humans. There would be serious short term and long term effects to the human body, and very possibly evolutionary changes in the long run. It would be like similar to what happened with Australia’s animals and the rest of the world’s animals. Not to mention the cost and difficulty of sending and supporting just a small crew of trained astronauts out of the atmosphere, let alone to another planet. As much as I would like to see it, I just don’t think its realistic. What is your take on this?
hey SMB! good to see you on the geek side. Why wouldn’t we? We have the ability to adapt and overcome. We know that feces and hydrogen are good for blocking radiation, we can also use lava tubes as habitation modules. Without advancing beyond chemical rockets thouh, it will definitely be expensive to go “out there.” as for right now, with chemical rockets, it’s about $10,000 USD per pound (16 ounces) to orbit. As the old saying goes; “no bucks, no buck rogers.” If we ever figure out how to get carbon nanotubes to go from the current 7-8 cm’s long up to 60,000 miles long, we’ll have the foundation for the space elevator, making getting to space FAR cheaper.
Is P = NP?
Hi Jeph, Why do astronauts on ISS still speak into a microphone rather than a more ”open-mic” scenario when communicating with ground crews? (Passing the mic around just seems clunky and out-dated).
thanks!
Excellent question, Time_Miner. I don’t know for certain, but I believe it has something to do with the bandwidth, as well as being a better quality mic than that used to pick up audio in the individual nodes and modules.
Why do spacecraft take so long to rendezvous with the ISS? If the ISS is less than 460 km away it seems it should be possible for the shuttle or Soyuz fly, from launch, directly to the ISS in less than 20 minutes. With computer controlled navigation this seems plausible. Why isn’t this done?
Why do spacecraft take so long to rendezvous with the ISS? If the ISS is less than 460 km away it seems it should be possible for the shuttle or Soyuz fly, from launch, directly to the ISS in less than 20 minutes. With computer controlled navigation this seems plausible. Why isn’t this done?
Why do spacecraft take so long to rendezvous with the ISS? If the ISS is less than 460 km away it seems it should be possible for the shuttle or Soyuz fly, from launch, directly to the ISS in less than 20 minutes. With computer controlled navigation this seems plausible. Why isn’t this done?