Starship Asterisk*

How do planetary scientists really know that Apollo objects are really main belt objects? Over the life of the solar system there have been uncountable collisions of objects with Earth and the Moon which should have caused numerous collisional debris to reach escape velocity and go into elliptical ...

Neufer, I believe the K-T extinction event was a combination of impacts occurring close together that included massive volcanic activity such as the Deccan Traps that are dated close to the time of the impacts. Hopefully, 1866 Sisyphus misses Earth by 10 million or more miles. Is the orbit of a bina...

Where did this rock come from? The local Martian landscape does not appear to be very rocky. And there are no cliffs from which it fell. Being balsitic it probably came from the Martian crust, but how did this isolated rock arrive at this location ?

Doug

I would suspect with that many there could be an unplanned perturbation. No. The perturbation environment is well known. It takes hundreds of years for chaotic elements to add significant uncertainty. What is the maximum aphelia of these Apollo asteroids ? No idea. Apollos are defined as having the...

I would suspect with that many there could be an unplanned perturbation. What is the maximum aphelia of these Apollo asteroids ? The source of these Earth-orbit-crossing asteroids are collisional debris from previous impacts on Earth. Is this correct? Is NASA planning for some type of diversion tech...

And it is retrievable. Especially invaluable on a long star trek. Doug

Neufer, I just viewed the "Graduate" last evening. You are truly amazing about plugging in quotations at just the right time. How in the world do you store and retrieve all this junk trivia? What is your secret?

Continually being flabbergasted by the forum,

Doug

After doing some research on the forum, it has come to my knowledge that she or he likes owls. Doug

I did not wish to know which asteroids might strike Earth in the next 100 years - only the number known larger than 1 km.

Apparently, the known "longer period comets" supposely from the Oort cloud have sizable bodies in the 1 km range ( ? )

Doug

I have some pictures of birds of prey monks keep in cages that I took when we visited some monastery nearby, but you are not going to like them. They have their wings cut off and don't look too happy. Let us prey. Why would monks do this horrible act? And what are these birds fed? Hunting for owls ...

Chris, are you telling me or are you hypothesizing about Owlice? Doug

Thanks, Chris, for your very concise and "to the point" reply. That is what I was looking for. I do not believe that Wikipedia has absorbed these postulations yet. So any asteroid at 1 km or larger is a serious threat worth diverting much of our defense spending to NASA. Some cross-trainin...

Hello Geckzilla, No, I have not been watching Ancient Aliens on TV. What channel is it on? It sounds like you have been watching the program and you are forgiven. I want to become your friend. Have ever seen early Greek construction next to Roman or Inca construction next to Spanish in person ? The...

Why does NASA not give as much attention to looking for larger intelligent artifacts and massive infrastructures on the Martian surface with their orbiting cameras ? NASA doesn't look for that because they're publically funded and want to keep their jobs. :shock: Can't you just imagine the right-wi...

I have seen some very credible U-tube presentations regarding Martian surface probe images by retired and/or fired NASA scientists and wondered where NASA mainstream stands. The public is to be feared, perhaps even more than asteroid attacks. I sit in my den with a sea of Neantherthals all around m...

We're still looking for signs of any life ever happening on Mars at all... and I'd start wondering about NASA if its funding requests were full of quests to identify alien monuments on Mars, myself. What have you guys been doing, watching Ancient Aliens on TV? Hello Geckzilla, No, I have not been w...

Why does NASA not give as much attention to looking for larger intelligent artifacts and massive infrastructures on the Martian surface with their orbiting cameras ? NASA doesn't look for that because they're publically funded and want to keep their jobs. :shock: Can't you just imagine the right-wi...

Rob, I can find only information about dates and sizes of craters but very little data about the possible sizes of asteroids that struck the Earth. I realize the velocity and angle of impact are also important. In other words, should we worry about an asteroid the size of a city block wiping out all...

I am sure it has a unique derivation.

The beauty of using Earth as your spaceship is that it already has built-in radiation shielding. Even in spite of total disruption of the Earth's surface, a surviving worldship on Earth's surface will still be shielded from internal radiation of nuclear decay and from interstellar radiation by an at...

Owlice is an unusual first name. Perhaps Owlice is your last name. That is what I meant. Doug

There is much talk about the chance of these subject asteroids striking Earth in the near future. But, I do not know what is considered to be the size for an asteroid that may be fatal to most life on Earth or what size may be fatal to life living on a land mass the size of a continent ? Below what ...

The Mars Science Laboratory is certainly a great achievement and some interesting data will be collected. If you are looking for life on Mars, why only look at some seashells on the beach? Why not look at the ocean itself as Newton suggests. Why does NASA not give as much attention to looking for la...

Calling all astronomers,

Copernicus devised the concentrics orbits of the known planets centered around the Sun. How did he know the order of the planetary distances?

Know you sky,

Designing a sustainable interstellar worldship is ridiculous. Where are you going? However, designing sustainable worldships or cities for the Earth's surface does make sense. I prefer to call them asteroid shelters. The worldships would be completely independent and supported by most of the planet'...