true

Learn IIT Foundation Classes from the Best Tutors

• Affordable fees
• 1-1 or Group class
• Flexible Timings
• Verified Tutors

Search in

# Measuring astronomical distances

Nawlendu Bhushan
10/04/2017 0 0

One of the areas of physics in which measurement has been bewildering is astronomy. How far away are the stars? How large is the universe?

These are the most fundamental and profound questions. One can trace the evolution of astronomy through the changing techniques of calculating stellar distances. Untill the end of nineteenth century, the only way astronomers could make these calculations was by measuring parallax.

You are familiar with the phenomenon of parallax without even realizing it. Wherever you are sitting, look around and find a stretch of wall with some sort of feature along it- a doorway or a picture hanging on it. Now stretch your hand straight out in front of you and raise a finger so that it is to one side or the other side of the feature. Now first close your right eye and then close your left eye. You will see that your finger jumped from left to right relative to the feature. If you move your finger closer the movement will be more. This effect is parallax. It happens because of the switch to different line of sight in observing an object.

Be in touch to know how this phenomenon is used to calculate astronomical distances.

0 Dislike

## Other Lessons for You

Failing in relatively easy subjects - remedies
Often most parents complains that their ward cleared many hard subjects but could not cleared the easy subject. The students perception about the subject makes it easier or harder not the course content....
B

Babu T

If (x+a)(x+1991) + 1 Can Be Factored As (x+b)(x+c) Where B,C Are Integers Then Find The Sum Of All Possible Integral Values Of A?
Answer: Method 1: x^2+(1991+a)x+1991a+1 Now for integers d should be either 0 or perfect square so, (1991+a)^2-4*1991a-4 (1991-a)^2-4 (1989-a)(1993-a) They both can be equal so for d = 0 a = 1989,...

Fundamentals Of Partnership Test: 11th Classes
Q1. X and Y are partners sharing profits and losses in the ratio of 3: 2 with capitals of Rs. 50,000 and Rs. 30,000 respectively. Each partner is entitled to 6% interest on his capital. X is entitled to...

Parabola
f (x) = a(x - h)2 + k, where (h, k) is thevertex of the parabola. FYI: Different textbooks have different interpretations of the reference "standard form" of a quadratic function. Some say f (x) = ax2...

### Looking for IIT Foundation Classes ?

Learn from Best Tutors on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

### Looking for IIT Foundation Classes Classes?

The best tutors for IIT Foundation Classes Classes are on UrbanPro

• Select the best Tutor
• Book & Attend a Free Demo
• Pay and start Learning

### Learn IIT Foundation Classes with the Best Tutors

The best Tutors for IIT Foundation Classes Classes are on UrbanPro