Astronomy Definition and 805 Threads

I need help identifying equations and trying to start these problems. Thanks... 1.) If Jupiter has an average temperature of 125 K, at what wavelength is it emitting the most energy according to Wien's Law? 2.) If a new planet is discovered beyond the orbit of Neptune which has a radius...

Hi I've just got a small problem that needs to be cleared here to allow me to do the other questions. Statement: Two objects were detected in a 100-sec exposure with 3x4 CCD camera Now you are given 3 by 4 matrices for the raw image data, bias, dark count and flat field. I've provided a link...

In a few days (pay day) I am hoping to buy a telescope as I've always been interested in the stars but i really am clueless as how to begin. I am hopeing to spend £150 max but would prefer if it cos a little less. I saw this on ebay but all of the specifications are beyond me...

Astronomy Problems: Please Help! I don't even know how to begin these problems. If someone could leave me tips or formulas or anything to help me solve these it would be greatly appreciated. Here are the following: 1. What is the diameter (in Kilometers) of Mars if it appears 18 arcsec...

I don't even know how to begin these problems. If someone could leave me tips or formulas or anything to help me solve these it would be greatly appreciated. Here are the following: 1. What is the diameter (in Kilometers) of Mars if it appears 18 arcsec in sized when it is 0.520 AU from...

Im currently a sophmore in college, majoring in physics. I really really want to pursue an astronomy related career, not sure exactly what I want to do, but I want it to be related to astronomy somehow. I am not having the best of luck with physics even with help and calc I was fine, but calc II...

Hey I've been practicing these example questions that our lecturer gave us as part of the preparation for the upcoming exam. I'd appreciate any help. I find it really difficult to do his work because his lecture notes barely explain anything. It would have been nice to have a textbook for the...

Alright so I was thinking a lot about doing physics w/ astronomy in university. Now the problem is I don't do physics (I did introductory stuff in science class from age 13-15, but it wasn't offered as a single subject after that). So would I be crazy to do it in university? I could get the...

A radio wave undergoes a phase shift of 180 degrees when it reflects from the calm surface of the ocean. In early days of radioastronomy, Australian Astronomers observed the interference between a radio wave arriving at the their antena on a direct path from the sun and on a path involving one...

ok the question is, Calculate the photons you expect to receive per Angstrom at the focus of a Cassegrain telescope of aperture 30cm for a star of V magnitude 9.0, observed at a zenith distance of 60 degrees. Assume extinction coefficient of 0.15 magnitudes per airmass, reflectivity at each...

Astronomy Problems HELP * URGENT* i am struggling with the following problems for my astronomy class. 1.) calculate the weight of a 91.0 kg (approx. 200 pounds at the surface of the earth) astronaut when his spaceship is at a point 51200.0 km above the Earth's center. also calculate his...

Hello, sorry I wasnt sure if this should be in the physics section of homework, but I didn't see anything where the astronomy section was...anyways. Im reviewing sidereal time systems, so given a right ascention and declination, I need to calculate what time an object is at its highest point...

rived directly (cf. physics courses such as ‘The Feynman Lectures on ... are required for the determination of accurate orbits from which masses can be ... http://www.strw.leidenuniv.nl/~israel/astronomy.pdf I hope nice link :smile:

I'm doing a presentation in this topic and I find it very hard to look for information on the web. Please, point me to any website or resources that have information about this topic? Thank You~! :confused:

http://arxiv.org/abs/physics/0508183 Authors: Michael J. West (University of Hawaii) Comments: Invited talk to appear in Communicating Astronomy with the Public 2005, eds. E.I. Robson and L.L. Christensen, 2005, ESA/Hubble Publishing, in press; 10 pages, 5 figures, pdf only Subj-class...

Hellfire requested that I post a list of classic papers that one could use for reference when trying to understand the current state of astronomy and cosmology. I'll do so here, but if I could politely ask the following: - Please do not debate the veracity of the papers in this thread. In...

Are New Ideas Important in Physics and Astronomy? If so, then why are young scientists with new ideas based in logic, reason, and reality, so often castigated, impugned, and crucified while those who quietly, passively, and uncreatively accept the nonesensical mythologies of String Theory and...

Would anyone list any physics/astronomy videos for entertainment? http://www.pbs.org/wgbh/nova/elegant/program.html Stephen Hawking's Universe '97 Thanks

What are the hot topics in astronomy and cosmology as measured by production of recent academic papers? I'm not looking for an exact number, just a relative ranking with some sense of order of magnitude. My motive is to get at the whole mainstream v. non-mainstream issue in a way that...

What are the Top 10 hands-on teaching activities for young beginning astronomy students? These activities must be hands-on, instructional and fun. Here's what I have so far: 1. Ellipse Drawing Using pencil, string, push pins and paper draw an ellipse. Accompanied with...

In class, we've been assigned a project over astronomy. We have graphed an equation for 6 of Jupiter's moons and the planets (separately), and the equation was a power equation T=ar^b. T is the orbital period of the moon or planet, r is the distance from the planet (or sun), and a and b are...

Anyone has the dia gram of recently used astronomy telescope? Can you let me see?

there is a great post over in General Astronomy https://www.physicsforums.com/showpost.php?p=507074&postcount=14 the author is someone I'm not familiar with named "moving finger" as in my wife's favorite verse from the Rubaiyat (no kidding, she likes the Rubaiyat and this quatrain is her...

hello. i am taking a planetary astronomy class and at the end there is a final project due. the project is "designing" a satellite mission within our solar system. we are to pick something (one thing) and visit it (it can be anything from asteroids to planets to moons, excluding earth, the sun...

Astronomy is the oldest of the physical sciences. In many early civilizations the regularity of celestial motions was recognized, and attempts were made to keep records and predict future events. The first practical function of astronomy was to provide a basis for the calendar, the units of...

How many people here work at an observatory, fulltime- if even such a thing exsists? What work do you typically do? Aside from teaching careers, what are my options in this field? Me I am really into theoretical physics, I am familiar with any physics term you throw at me, but don't quite cut...

What is the difference?

Is astronomy hard for very few rewards? I mean can you do anything with a degree with astronomy I think that it's cool and all but isn'nt it the most unpractical of the sciences.

"Review of Cosmic Vision 2015-2025" begins: "The Cosmic Vision workshop at UNESCO on 15-16 September 2004 showed that Europe is richer than ever in ideas for what should be done in space science in the coming years. This workshop brought us a major step forward in developing the vision of the...

hey guys.. well i am new in astronomy. kinda under age.. still 17 but soon i am going to get a new telescope and the problem is that i hear a lot about "magnitude" and "latitude" but the problem is that i don't know how to deal with so please i would appreciate if someone can help...

Hello everyone. Me and my fiance are takin Astronomy 101 this semester and we are having quite a hard time. We are absolutly stuck on this one question and the textbook we are given is not helping one bit. So as a last hope i did a google search on astronomy forums and this is where it...

Well, first off, i founded an astronomy club at school finally, (warren'd be pleased to know that.) It was also supposed to continue through the summer. Its been pretty unsuccesful though. With the exceptions of my boyfriend, my little sister, and a boy who I'm pretty sure 'digs' me, no one has...

I am taking an introductory astronomy course and am having problems finding the calculations needed for this problem. It is not a homework problem, just an extra question at the end of a chapter. I have asked my professor about this, and he is not sure either...any help is greatly appreciated...

I am at the moment in the middle of the classic "determining the mass of Jupiter by the motion of the moons" experiment. I have, however ground to a halt at a certain point, and am unsure as how to proceed. I have a series of photographs of the moons. We have a beautiful 14" in our University...

Hi, I am writing a project on ways to measure the angular size of our sun and distant stars. I've been given a list of ways this can be done and have been told to research them. However :biggrin: I am having trouble finding information on 2 of the methods. Using the transit of planets: I...

First view of the Earth from the Martian surface...Orion constellation...partial solar eclipses. Fun stuff. http://www.cnn.com/2004/TECH/space/03/12/mars.earth/index.html

I'm just looking for a list of "Uses of Astronomy" that I can look up in more detail. I've done quite a few searches, but can't seem to find anything other than time-keeping. Also, if anybody knows any "Future uses of Astronomy", then that would be a big help. If you think I'd get more...

http://www7.nationalacademies.org/bpa/projects_cpu_plan.html The Board on Physics and Astronomy proposes an assessment of an area of science at the intersection of physics and astronomy. The study will provide a broad vision that goes beyond traditional categories of space missions...

I've got a question about astronomy and star collision : I have to make a project about a topic (in astronomy) which takes about half a year. Now one point is that you can't just collect data and write a a text about that. You also have to do some practical work. No first I wanted to choose...

"Astronomy" says light slows down... Does the response to a question about gravitational lensing on page 72 of the March issue of "Astronomy" agree with other statements on this forum about the absolute nature of light speed? The question asked by "Astronomy" reader Tom Schmidt: "I noticed...

Personnally I think astronomy, at the present time, is a waste of time for several reasons. The current resources allocated for astronomy range in the billions of dollars. Also the current minds working on astronomy could be doing something far more useful for society. For example we could put...

I need help please. i have a couple of questions if someone could please help me with. 1. If a satellite with a small mass (any #) is orbiting the Earth with an orbit radius of 4000000m, what is the circular velocity of the satellite? 2. if the distance to an object is 4000000 km and the...

I could sure use some help with this question on my Astronomy homework: When the moon is at opposition from the Sun, what time of the day does it rise in our sky? To try to figure it out, I drew a picture with the objects in this order Moon ---- Earth ---- Sun I thought that maybe...

How do we know that the physics we can do in labs here on Earth today is the same physics in galaxies a long time ago and far, far away? Take a collection of your favourite theories - the gravity of Newton, the electromagnetism of Maxwell, the quantum world of Schrödinger and Heisenberg...

Was cleaning out my PM inbox and outbox----sometimes miss messages because the boxes overflow----and saw that back in August I sent someone a link to a good "history of astronomy" webpage which I then forgot about. Where to put good astro links? So here is a thread for useful general...

Why do you like Astronomy? It can be an expensive hobby, the best time to do it is on cold dark nights, the best results are tenuous and often difficult to achieve, and rarely do others share or even appreciate your enthusiasm. I am an amatuer astronomer (more of a casual observer) and I...

Who do you think contributed most to Astronomy? I was thinking between Galileo and COpernicus, but there are many more, so I wanted to know what you thought.

Have any of you been to a High School which had an Astronomy class or even a Telescope? They should teach Astronomy more in High School, since their computer classes seem to be lacking. I know I've never heard of a high school in real life, that taught Astronomy.

we need new people in the Astronomy Q/A thread Someone who may be a newcomer just posted a neat couple of questions and since I've played already a lot I am staying out to give new people a chance new players will think of different questions and it'll be more interesting ---check your PM...

The Eskimo Nebula has always been my favorite: http://antwrp.gsfc.nasa.gov/apod/ap020407.html