Astronomy Definition and 833 Threads

Assuming a candidate for an astronomer position in the US fulfills the standard skills and requirements, would it be seen as an added plus to speak, write, and understand Russian fluently?

Homework Statement If you have a large telescope that has a 5 meter diameter with a field of view of 1 foot by 1 foot, and a small telescope with a diameter of 1 meter with a field of view of 1 degree by 1 degree, and your trying to take images of 30 quasars that has a limiting visual magnitude...

Downloads are approaching 300,000 so somebody is interested. The 'planet', if it exists, is expected to have an 'appreciably eccentric' orbit. Is there any inventory of how many teams might be searching for this object?? EVIDENCE FOR A DISTANT GIANT PLANET IN THE SOLAR SYSTEM Konstantin...

I'm an astrophysics student. Wish I could math better. Good luck to you all in your studies.

Homework Statement (This is a long problem but I think the question is not hard.) Determining the star density from star counts is tough, but estimating counts from a density law is simpler. In practice, this method of fit-ting observed number counts to an assumed density law is becoming a...

If hypothesised planet nine is really discovered in the outskirts of our Solar system, will M. E. Brown and K. Batygin have a chance to win the Nobel prize in physics or is this too much of an old hat for the Nobel-commitee?

Homework Statement Which is the angle between the ecliptic and the horizon in the moment that the point of Aries is hiding for an observer whose position is 18 degrees north? 2. Homework Equations None The Attempt at a Solution The first thing I have tried to is to do a drawing of the...

Public lecture on aspects of galactic clusters. Covers physical characteristics, observation methods, dynamics and evolution, interactions within clusters, types of components (galaxies), dark matter, gravitational lensing.

Public lecture on aspects of rotating astronomical objects. Covers planetary and stellar rotation, protoplanetary discs, accretion discs and galactic rotation curves. Mechanisms and observation methods.

I just want to say hi. I love physics. Astrophysics in particular! I'm a returning undergrad to an undisclosed university. I plan to get my PhD in physics as well. I'm on here to get guidance in that. I would also like to discuss math and physics problems as well. Looks like I came to the right...

Homework Statement Go to the following web site: http://www.astro.utoronto.ca/~cclement/cat/listngc.html This is the portal to a large on-line catalog of variable stars in globular clusters. Each link is a cluster name and will take you to a simple text page that lists near the top the...

What would be the propable trajectory and position of the ninth planet that has been suggested few days ago (20.1.2016 by Konstantin Batygin and Michael E. Brown) ? if i understood correctly, the exact position of the planet is unknown and has not been evaluated. But by looking this article...

As the Stephan-Boltzmann's Law says, the minimal change in a star's mass would have a massive effect on its luminosity, but can necessarily two stars with the same mass have the same luminosity?

Hello. I've got two questions: 1) In the U.S., what's the average time per week that a graduate student doing a PhD in astronomy work? 2) In the U.S., what's the average time per week that a postdoctoral researcher in astronomy work? Thanks in advance for your answers.

I have been working with some Herschel images and I am finding it difficult to extract the astronomical sources from the image. The image background is extremely non uniform so i am not able to differentiate between the background and the source. I used some tasks in HIPE like source extractor...

I am trying to find the temperature of a star given its wavelength in micrometres, but I am not sure if my conversion is right therefore don't know if the answer is correct. Star A has a maximum emission wavelength of 1 μm and Radius 100 Rsun. What is its Effective Temperature and Luminosity...

Having the unaided eye's pupil to be 6.4mm and the diameter of a telescope 8-inches, how can I calculate the amount of light the a scope collects over the human eye?

hello, can anyone give me what they know about astronomy and astrophysics subdivisions in masters degrees and Ph.D.s . thank you

Hi guys! Like the title says, I'm applying for 10 astrophysics-related REUs, and I'm a frosh, so I have few other people to ask for guidance. Please let me know if this is a good baseline to add to. Thank you all in advance!Sitting in the middle of an abandoned lab, late on a Friday night, head...

Hello. I read that in astronomy a PhD lasts an average of 6.1 years. But what about postdoctoral research? In astronomy, what is the average duration of doing postdocs before finally getting a real job? (a job as an astronomer; not reconverting to another field to get a job in this other...

I have this formula "E= 1/2 mv^2" which I don't fully understand. Also, I don't have the values for helium's mass and velocity.

I'm just trying to build Doppler shift equation for Moving observer and stationary source. I have an problem in a step. I'm attaching a screen-shot please check it and tell me where to this step ( 1 - v/u)^-1 comes from ? Thanks in advance.

Hi! I'm new to the forum, but I'm looking for some people who live in Honolulu who are interested in astronomy, astrophysics, cosmology, etc.. I'm especially interested in clubs/group meets and getting together to view astronomical events. Check out my profile to learn more about me. :)

Hello, all! My name is Marina and I currently live in Honolulu, HI. I'm an ocean engineering major, but my primary interests are in astronomy and astrophysics! I'm hoping to meet a lot of people here that can help me deepen my understanding of those subjects, and maybe even find some people...

I am participating in science olympiad just for fun this year, because i have a mild interest in astronomy. I am in the astronomy event, my partner has decided to split the knowledge into math and non-math, and as i will be handling the math I would like a book(or however many) that has...

Hello all! I am currently a freshman (just finished my first semester) and I need to choose a career path. I have had a burning love and passion for Astronomy/Astrophysics from a very young age but I hear that the job market for Astro Ph.D's is complete and utter dang (pardon my French). I grew...

I am attending college next year but I am really confused between two majors. I am interested in astronomy and my dream is to pursue my career doing astronomy and I can wait to study astronomy in college. I know that astronomy is completely physics but I am confused whether should I choose...

1. The problem statement, all variables and given/known dat Show that if you have a signal f and noise σf for a stellar flux measurement, then the uncertainty on the observed magnitude is given by σm = 1.0875 x σf / f Homework Equations (you should use the fact that when ε<<1 then log(1±ε) ≈...

I am 34 years old and have a bachelors in math from about 10 years ago. I've also taken 3 graduate physics courses throughout the years. I work full time as a systems analyst, and have been doing this type of work since I graduated from college in 2005. I also have an MBA. I’m wondering, with...

Greetings, Hi, I am new member of Physics Forums. Here is my question: How many stars can we see from Earth? and also If you know, How far can we see? Thanks!

Hi! So I've begun the process of looking at colleges now and I really would like to go to a school in the US or Canada with an astronomy major, an observatory of its own, and some sort of planetary science program. I've made a list of the schools that I've been able to find with those things...

I've been struggling with part (a) of this question. I'm not quite sure what the relation is. Any help is greatly appreciated! Thanks! Consider a spiral galaxy with a “flat” rotation curve beyond the central 2 kpc. a. Derive the general relation giving the orbital period, P, of a star (or...

Interested in learning about Astronomy/ Astrophysics. I do not know anything besides the planets, and apparently I learned today that Asteroids are rich in metals.?? I am looking for a book that is introductory, but is not to easy. I have taken a course in freshman calculus based mechanics and...

Well I was just wondering that what exactly difference between Cosmology and Astronomy...?

Good day :smile: For quite some time now, I've been thinking about what I should make my Internal Assessment for the IB course in physics on. The main objective of the IA is to find and prove a mathematical relationship between an independent and dependent variable. A very, very, simple example...

I am really interested in learning more about the space and the universe. And studying about stars interests me the most. So, I have decided for a career in stellar astronomy. However, stellar astronomy is a very huge field of space science and a rarely chosen career. I have a thousand of...

I was curious about what forces can be applied to a molecule to cause a rotational emission.

Homework Statement What is the Jean's length in parsecs for a typical neutral hydrogen cloud, which has a density of n(H I) ~10^8 atoms/(m^3) and a temperature of 100K? Homework Equations jean's length = sqrt[(15*K*T)/(4pi*G*u*p)] where: 'K' is the Boltzmann constant 'T' is the temperature of...

I am a sophomore at RIT studying imaging science, which is essentially a major dedicated to the engineering and development of imaging technologies. i.e. MRIs, lasers, telescopes---anything that involves light. I love my major and plan to use it to pursue a career in astronomy and planetary...

I am only in grade 10 but stupid Careers course says I have to choose a career to do a summative study on. I want to choose something that I might go into but I can't choose. The NOC list for "Physics and Astronomy" is very long--I deleted the ones I am not interested in: aerophysicist...

Hello people i know this program is better to use on Linux, but for personal reasons i can't change to Linux OS. So I'm having a little problema on how to use python and install the modules of astropy, ipython, I've already installed pip but i have a error on python shell that says: Error...

Mobile, airborne, and terrestrial 3D laser scanning gives an unprecedented amount of data to companies, organizations, and governments. However, I am wondering whether or not 3D laser scanners have ever been used in astronomy, astrophysics, and in astrocartography... If they haven't, I believe...

Hello. I'm a French student and I'm planning to go to the United States for a graduate program in astronomy. When I will arrive in the U.S. I will begin by the first year of graduate. Then I will pursue with a Ph.D. and some postdoctoral research. I would like to know which are the best...

So I'm trying to k-correct some fluxes in 250μm (janskys) using the M82 template found here and the relevant equations found here (I also have the transmission filter function). The template is normalised to 5500 A and doesn't have a brightness so I fail to see how I can correct my observed...

Is it possible to rig a Truss Dobsonian telescope like this one so that you can control it remotely from inside of a building while the telescope itself is on the roof of the building? Then is it possible to attach some sort of adapter to the telescope that would allow you to hook up a camera...

Hello everyone, this is my first poster here. I met this problem when I was attending class of interstellar medium, and I was confused by the question.

Hi there, The University of Arizona has these two institutes (among many others, of course): - Lunar and Planetary Laboratory, LPL for short - Steward Observatory As far as I understand, both are into space research and astronomy. If I wanted to join either one or the other, I would have no...

Hi I am a high school student and currently planning to apply for undergrad studies but i am bit confused in deciding my major.I am pretty sure that I want to major in field related to physics .I am interested in astronomy /astrophysics and also interested in engineering .Please can anyone...

What Is the difference between Cosmology and Astronomy..?

I'm a junior in high school and I'm starting to look into colleges. The one that I'm most drawn to is Wesleyan University in Connecticut. I want to major in astronomy and physics, perhaps with a minor in planetary science. Wesleyan offers all of those courses, but does anyone know if they are...