# Jayjay

### Need Help With Stellar parallax – The Parsec?

Stellar parallax – The Parsec

If the parallax angle is one arcsecond (1 “) the distance to the star is called a parsec

d (parsecs) = 1/p (p in arcsecs)

Converting degrees to arcsecs (in radians)

• Multiply by 2π/360 to convert to radians

• Then multiply by 1/3600 to convert to arcsecs

1 parsec = 3.26 ly

1. Proxima Centauri, our closest star, has a parallax angle of 0.7687 arcsecs. Find the distance in parsecs to Proxima Centauri.

2. Find the distance in parsecs and light years to Procyon, which has a parallax angle of 0.285”.

3. The distance to Sirius is 8.6 ly. What is its parallax? (angle)

4. The distance to Gliese 876 is 15.3 ly. What is its parallax?

5. Explain why stellar parallax can only be used to measure the distance to stars up to about 300 ly using earth based telescopes.

I'd really appreciate if you would answer these questions

I really dont understand. Thanks

2 AnswersAstronomy & Space7 years ago### Need Help With Stellar parallax – The Parsec?

Stellar parallax – The Parsec

If the parallax angle is one arcsecond (1 “) the distance to the star is called a parsec

d (parsecs) = 1/p (p in arcsecs)

Converting degrees to arcsecs (in radians)

• Multiply by 2π/360 to convert to radians

• Then multiply by 1/3600 to convert to arcsecs

1 parsec = 3.26 ly

1. Proxima Centauri, our closest star, has a parallax angle of 0.7687 arcsecs. Find the distance in parsecs to Proxima Centauri.

2. Find the distance in parsecs and light years to Procyon, which has a parallax angle of 0.285”.

3. The distance to Sirius is 8.6 ly. What is its parallax? (angle)

4. The distance to Gliese 876 is 15.3 ly. What is its parallax?

5. Explain why stellar parallax can only be used to measure the distance to stars up to about 300 ly using earth based telescopes.

I'd really appreciate if you would answer these questions

I really dont understand. Thanks

3 AnswersAstronomy & Space7 years ago### Why did America increase the number of troops to send to Vietnam in 1965?

Please don't ask why but it must include an analysis, evaluation and a conclusion. It should include previous involvement, Gulf of Tonkin and Johnsons speech.

Thanks to those who help

1 AnswerHistory8 years ago### need some sector help?

please answer these answers quickly

radius=13cm degrees is 23 what is the length

arc=20cm degrees is 30 what is the radius

perimeter=21cm degrees is 305 what is the perimeter

give your answers to 1 decimal place

OABD is a sector of a circle

angle AOB= 96 degrees

the radius OB = 24cm

work out

the length of OC

the area of triangle OAB

the area of sector OABD

the area of segment ABD

give your answer to 1 decimal place

1 AnswerHomework Help8 years ago### Can you listen to stuff on the computer with the Turtle Beach PX5's?

I have gotten a pair of turtle beach px5's and i was wondering if i can listen to stuff on my computer with them.

4 AnswersOther - Electronics8 years ago### CreateDXGIFactory1 could not be located in the dynamic link library dxgi.dll?

I have just bought Arma 3 on steam but whenever I go to start Arma 3 it says "The procedure entry point CreateDXGIFactory1 could not be located in the dynamic link library dxgi.dll" I have no idea what this means and when I searched it up I didn't understand anything that the posts were saying. Please can you tell me how to fix this using the simplest terms possible.

Thanks

2 AnswersSoftware8 years ago### What one is better for gaming?

What is better for gaming an i3 processor with 6gb RAM and 750gb hard drive Or an i5 processor with 4gb RAM and 500gb hard drive?

8 AnswersLaptops & Notebooks8 years ago### What Inspiron 15 laptop should I buy?

Hey I want to buy an Inspiron 15r but there are two prices one is £399 and the other is £420. I will refer to the cheapest one as Y and the more expensive one as Z.

Y specs.

3rd generation Intel® Core™ i3-3110M processor (2.40 GHz, 3M cache)

Windows 8 64bit, English

15.6in High Definition (1366X768) WLED with TrueLife

6GB2 DDR3 SDRAM at 1600MHz

750GB (5,400rpm) Serial ATA Hard Drive

8x DVD+/-RW Optical Drive

Intel HD Graphics 4000

6.05 lbs

Z specs.

3rd Generation Intel® Core™ i5-3210M processor (3M Cache, up to 3.10 GHz)

Windows 8 64bit, English

15.6in High Definition (1366X768) WLED with TrueLife

4GB2 DDR3 SDRAM at 1600MHz

500GB (5400RPM) Serial ATA Hard Drive

8x DVD+/-RW Optical Drive

Intel HD Graphics 4000

6.05 lbs

Remember I want to use the laptop for games like league of legends, dayz and other hd games.

Please help me out.

4 AnswersLaptops & Notebooks8 years ago