GK
THE UNIVERSE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The planets are much closer than the stars they orbit.
|
|
|
The planets are much larger than the stars they orbit.
|
|
|
The planets are much farther than the stars they orbit.
|
|
|
The planets are much smaller than the stars they orbit.
|
Detailed explanation-1: -Modern telescopes make it possible for astronomers to detect planets around distant stars. Why couldn’t astronomers detect these planets before? The planets are much closer than the stars they orbit.
Detailed explanation-2: -So, rather than appearing to orbit, the way planets do, stars just show a small “wobble.” Scientists can detect this wobble via tiny shifts in the light the star emits, and use it to calculate the mass and distance of its planet.
Detailed explanation-3: -Space telescopes have found thousands of planets by observing “transits, ‘’ the slight dimming of light from a star when its tiny planet passes between it and our telescopes. Other detection methods include gravitational lensing, the so-called “wobble method.”