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Do you think that planet nine could be a brown dwarf thus making it so difficult to spot?

How large was the universe when the first light was released in the form of the CMB? And how was it released everywhere all at the same time? Surely different parts of the the universe where differed temperatures and densities so the light should have been released at different times?

Sigh, please save your own credibility and come to understand that Starship is a failed program that will never achieve it's stated goals even with Elon's latest fixes proposed on April 6th. This is embarrassing when channels continue to prop up Musk and the insanity of Starship. It's going to doom the Artemis mission as it is, why doom any other program as well?

If gravitons were real, would they have wavelengths like photons? Since both are exchange particles of fundamental forces?

Does the plane of spin of a super-massive black hole at the core of a galaxy necessarily match the plane of spin of the galaxy as a whole? What if it dosen't?

can you do a story about this science.nasa.gov/missions/webb/nasas-webb-maps-weather-on-planet-280-light-years-away/

There is no need to simulate an entire universe on an atomic level until the atom or particle is observed. The rest can be calculated fuzzy. It would explain the Schrödinger's cat thought experiment.

Among us. 100% to me.

"If a dumb rock can make an interstellar journey, why not a smart rock?" Perhaps dumb rocks aren't subject to insanity? and a trip too long triggers insanity? So even if a rock starts smart, by the time it arrives, it's dumb?

Why does Venus rotate clockwise, and so slowly?

It is metalicity that keepbstars smaller. The early universe had only hydregen helium and traces of lithium. So direct collapse possible

If robot probes are on the way, then ship decelerating from near the spead of light or even 1% the speed of light would be flaring concentrated intense energy astronomy would be detecting by now even if they were 1000s of lightyear away.

its nice how you can respond to even the most impossible questions like aliens producing black holes :)

Thanks, interestering straight forward doc no bs and well presented,cheers

If you get pancreatic cancer you better go with my Jewish carpenter friend.

They will find the Tengri People there.. 👍

Andoria: If you take two circles of reflective coating plastic sheet and weld the edge you have a balloon when inflated in space. One will be a concave mirror, the other can be clear allowing light to pass through. The light will be reflected to a focal point and you can use it as a telescope. You can also use it to focus reflected sunlight onto asteroids or the moon for thermal mining. And you can use it to measure the micro meteoroids over the operational lifetime of the reflector. The sunlight UV light would harden the plastic sheet to the inflation shape. The loss of inflation pressure would not change the reflector shape once hardened by UV light. If you push a gas cloud out in front of your hyper velocity spacecraft you will help mitigate the effects if some of these micrmetiorites.

Not a good choice for an interview. She seems like a college student… not some kind of expert or scientist.

Thank you for all the news 🎉

Hey Fraser - what kind of spacecraft would it take to orbit the sun so that the craft remains within the solar gravitational lens? Do you think it can be done within, say, 100 years?

There can be only one this time ;)

What a shame V1 and V2 didn’t have digital cameras integrated… 🙏

Man what a great video thanks gosh I love space ! And the J.W.S.T.

This was a nice conversation!

Thank you!

if we never find exomoons, we must start considering how moons and life may be connected, as we also dont seem to find life anywhere else. very strange

The JAXA space debris mission is pretty exciting. Even besides the prospect of keeping our orbit clean and safe, I'm sure the technology that can capture flying junk out of space will have other practical applications for science missions and just space habitability in general.

Million and million of dollars spend just to get a 5%. Wasted money i think so.

5% of what exist.

Sorry, your sideburns got me so confused. I couldn’t pay attention to anything you said, why is your right sideburn so much lower than your left side?! Drove me insane.

Fraser, what is it about the gyros that prevents them being made to last 100+ years?

Hubble is indeed so necessary for astronomy! Please, NASA, service it one more time!

Hi Fraser, here you announced that "black holes can kill star formation in a galaxy", but isn't the jet of outgoing gas itself the raw material to form stars and planets? Got confused here, can you develop this?

Hey Twila! Where have you been?

I was cringing the whole time watching this video. I could only do about 50 minutes...

What will NASA do to Hubble when it's finally decommissioned?

What horse head?! I see a headless man with a club in one hand and bright light in the other.

Why does Hubble use mechanical gyroscopes instead of laser gyroscopes? Do the laser gyroscopes not have enough accuracy? Even if this is so, would it make sense, should there be a new servicing mission, to include both laser and mechanical gyroscopes, to preserve at least some functionality should all the mechanical gyros fail?

Silurian hyptosis is as astrophysisist describe it is an example of total failure to consult cross disiplinary experts. They think only of archielogical evidence, that would indeed be gone in a few million years. But a Technological civilization like ours leaves evidence of another kind which geologists are well aware of. MINES, specifically things like massive open pit mines that access the richest mineral loads from geologic formations that are BILLIONS of years old. The level of mining that Humans have done to Earth is stagering in both volume and it's targetedness. We can definitivly rule out any prior mining of comperable scale having been done all the way back to the Pre-cambrian age which means it wans't done by native life. A mining pass by extrateresstrials prior to that can't be ruled out, but they would have needed to do it without introducing any multicellular organisms which seems unlikely unless its a non biological source like a self-replicating probe, but then again we would expect that to utilize asteroids instead of planets.

Technical answers in a second language are difficult, but he was trying!

You can see the horse head nebula with a backyard telescope!? Every time I watch one of these I want to get my own telescope

In re: Space dust @ relativistic speed collisions. Might such a spacecraft have a "bumper" in front of itself to deal with dust OR use a strong magnetic field to divert such things (ions especially?). If you are sending a spaceship out that far and that fast, it should have a fairly powerful reactor for power and perhaps thrust (captured ions accelerated in a specific direction = thrust). Yeah this sort of uses the Bussard Ramjet idea, but this would be fueled by stuff collected and stored and used for attitude change, not main thrust. And for all we know there is already some civilization using this... (basic mathematical predictive theory. Meh, just wondering.🥴

SLIM survives the lunar night again. "All the best stuff is made in Japan." Marty McFly.

What would "clear skies" even look like on a gas giant? Is it just that the clouds aren't stirred up on the far side so you'd have to go closer to the core before it got "cloudy"?