What evidence do we have that the sun contains the element iron?
Cards
| Term the most comment elements in the universe are? | Definition helium and hydrogen |
|---|---|
| Term what evidence do we have that the sun contains the element, iron? | Definition solar spectra shows absorption in spectral lines that are characteristic of iron & are unique to it |
What is the biggest advantage of a reflecting telescope?
Reflecting telescopes have many advantages over refracting telescopes. Mirrors don’t cause chromatic aberration and they are easier and cheaper to build large. The are also easier to mount because the back of the mirror can be used to attach to the mount. Reflecting telescopes have a few disadvantages as well.
Why are most large telescopes reflectors not refractors?
Why are most large telescopes reflectors, not refractors? Reflectors do not suffer from chromatic aberration like refractors do.
What is the primary problem with refracting telescopes as opposed to reflecting telescopes )?
Absorption of light passing through the glass is a bigger problem for Cassegrain reflectors than achromatic refractors. To reach the Cassegrain focus, a hole must be cut in the center of the primary mirror. The largest refracting telescope can collect more light than the largest reflecting telescope.
Why are reflectors better than refractors?
Refractor telescopes use specialized lenses that make them a favorite for deep space objects like galaxies and nebulae. Reflector telescopes are more popular with larger and brighter objects like the Moon and planets because they use mirrors that provide more sensitivity to all wavelengths.
What are two disadvantages of refracting telescopes?
Disadvantages:
- Very high initial cost relative to reflector.
- A certain amount of secondary spectrum (chromatic aberration) unavoidable (reflector completely free of this) The colours cannot focus at one point.
- Long focal ratios can mean that the instrument is cumbersome.
Are reflecting or refracting telescopes better?
Each telescope has its own advantage, for instance the refractor is better for observing the planets and the moon and the reflector for deep-sky objects (e.g. galaxies). However, the refractor suffers from what is known as chromatic aberration.
Which type of telescope is in general the largest?
Arecibo Observatory The Arecibo radio telescope still represents the largest single-aperture telescope ever constructed, with its spherical reflector consisting of 40,000 aluminum panels each 3 feet by 6 feet.
What is the strongest telescope on Earth?
James Webb Space Telescope
Does the Vatican own all telescopes?
VATT is part of the Mount Graham International Observatory and is operated by the Vatican Observatory, one of the oldest astronomical research institutions in the world, in partnership with The University of Arizona….Design.
| Optical System | Aplanatic Gregorian f/9 |
|---|---|
| Focal Length | 16.48 m |
| Primary Mirror | f/1.0, Diameter 1.83 m |
Which country has the largest telescope in the world?
In Pingtang, Guizhou province stands the Five-hundred-meter Aperture Spherical Telescope (FAST), the largest radio telescope in the world, surpassing the Arecibo Observatory, which stood as the largest in the world for 53 years before the construction of FAST was completed in 2016.
What’s the farthest we’ve seen into space?
galaxy GN-z11
What is the least massive star?
Size and mass
| Title | Object | Data |
|---|---|---|
| Largest star | Stephenson 2-18 | r=2,150 R ☉ |
| Smallest star | EBLM J0555-57Ab | r=0.084 RSun |
| Most massive star | BAT99-98 | 226 MSun |
| Least massive normal star | SCR 1845–6357 A | 0.07 MSun |
What type of stars are the most luminous?
Perhaps the most luminous star known, the Pistol Star emits almost 10 million times the power generated by the Sun, and it would engulf the Earth if it were placed at the Sun.
What star system has the most stars?
Castor is the system with the most stars within 25 parsecs: it is a sextuple system.