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The star attracts the planet; the planet attracts the star. As a result of the latter, the star changes position. If this change is such that the star moves away from us during one part of the planet's orbit, and towards us at another (or more generally, the star's speed towards us, or away from us, changes slightly), then this can be detected as a Doppler shift.
Wiki User
∙ 7y ago
Wiki User
∙ 15y agoThe Doppler Effect has helped astronomers determine the distances of stars from Earth.
Wiki User
∙ 10y agoBasically, whether the star is approaching or moving away from us, and how fast.
Wiki User
∙ 12y agoits helped them see stars.....DER!!
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How can astronomers tell whether there is a second unseen star in a system?
Because of perturbations within the observed star.
Can astronomers tell from the elements of a star what uts surface temperature is?
The temperature of a star is determined for it's colour spectrum. The hotter the star the more the spectrum is towards blue where as a cooler star has a spectrum closer to red.
Does the absorption spectra tell astronomers if a star is moving towards the earth?
Yes, or at least it is used in determining that. However, it is only part of a much larger calculation in determining if it has a red or blue shift
What causes a redshift in light from stars?
No. The Doppler shift tells us if the object is moving toward us or away, and how fast. But it says nothing at all about whether, or how fast, the object is moving to the side. Doppler tells us about the part of the velocity that is TOWARD or AWAY. It says nothing about its velocity left, right, up or down.
How does the light that astronomers see from distant stars and galaxies tell htem that the same atoms with the same properties exist throughout the universe?
We determine the types of elements contained in the star or within the corona by analyzing the spectrum of the light we receive. Each element will radiate at a set of specific discreet frequencies, and the frequencies they radiate tell us what the element is, and how deeply ionized it is. The spectral analysis is exact; we can even determine the proportions of the elements that we see by the relative brilliance of their light. But there IS one thing that the spectrum cannot tell us; is this a normal matter star, or an anti-matter star?
What does the Doppler Effect tell astronomers about the universe?
It tells us that the Universe is expanding.
What can a stars spectrum tell astronomers about a star?
What elements the star is made of.
What does analysis of colors tell astronomers about objects in space?
Doppler shift tells the distance form the earth station
What can a stars spectrum can tell astronomers?
What makes up the star or element.
How can astronomers tell whether there is a unseen second star In a system?
Because of perturbations within the observed star.
How can astronomers tell whether there is a second unseen star in a system?
Because of perturbations within the observed star.
What can the Doppler effect tell us about in astronomy?
It can tell us whether a star, or a galaxy, is moving towards us or away from us.
Can astronomers tell from the elements of a star what uts surface temperature is?
The temperature of a star is determined for it's colour spectrum. The hotter the star the more the spectrum is towards blue where as a cooler star has a spectrum closer to red.
Do you use the Doppler effect or particle accelerators to measure the speed of stars?
The Doppler effect is used to detect whether a star is moving away from us or towards us. This method doesn't tell us anything about a star's "sideways" movement. OR The Doppler Effect should be corrected for the (gravitational) size of the star, since gravity also changes the light's energy. re: Sideways movement, I thought special relativity reacts to sideways motions? Besides, how long can a star be traveling sideways -- technically, no distance.
How is ultra violent studied by astronomers?
UV is studied in strength from stars like our sun. they use this to tell how old the other star is and how far it is from death
What is it important for astronomers to study the sun?
SSo the astronomers can tell us what is happening to the sun. that good enough? :)
Does the absorption spectra tell astronomers if a star is moving towards the earth?
Yes, or at least it is used in determining that. However, it is only part of a much larger calculation in determining if it has a red or blue shift
