Physics

That the radio lobes radiate synchrotron radiation indicates that a. high-speed electrons are ...

Started by silviawilliams41

Centaurus A is a radio galaxy that has a visible galaxy at the center. This central elliptical ...

Started by Mimi

If the redshifts of quasars arise from the expansion of the universe yet they have brighter ...

Started by Mr. Wonderful

Soon after discovery, it was observed that quasars had a starlike appearance which was blurred by ...

Started by laurencescou

____________ galaxies contain a supermassive black hole at their centers while active nuclei are ...

Started by washai

Galaxies may contain a supermassive black hole at their center but ___________ an active nucleus ...

Started by Deast7027

Statistical evidence a. can be used to draw conclusions about a specific cases. b. is applicable ...

Started by bcretired

What was the first evidence that quasars were different from astronomical objects before they were ...

Started by Sportsfan2111

According to the unified model of active galactic nuclei, ___________ is in the center surrounded by ...

Started by Mollykgkg

___________ is (are) observed when light from a distant quasar travels past a massive galaxy between ...

Started by fbq8i

Seyfert galaxies a. are more common in close pairs of galaxies than in isolated systems. b. emit ...

Started by karen

Quasars are most common with redshifts a. less than 0.1 b. less than 0.5 c. of about 2 d. ...

Started by awywial

In the unified model of active galactic nuclei, the broad line region in an active galactic nucleus ...

Started by Mimi

The unified model describes active galactic nuclei using a. a supermassive black hole at the ...

Started by jeatrice

If Hubble's constant is taken to be 70 km/s/Mpc, and a quasar is found with a radial velocity of ...

Started by TFauchery

If a quasar has a recessional velocity of 2.7 105 km/s and is determined to be 3600 Mpc, what is ...

Started by xclash

The hydrogen Balmer line H has a wavelength of 486.1 nm in the laboratory. It is observed in a ...

Started by Themember4

How are astronomers able to determine that quasars are so small? a. They are variable over a ...

Started by Mr3Hunna

What is the major observational difference between a Seyfert galaxy and a normal spiral galaxy? ...

Started by kwoodring

How do astronomers know that the luminous regions of active nuclei of active galaxies are very ...

Started by genevieve1028

Why do astronomers believe supermassive black holes are the source of an AGN's energy? a. Such ...

Started by tingc95

Which kind of active galaxies has been observed at the greatest distances from us? a. Seyfert ...

Started by tatyanajohnson

Via the rotation curve method, we can estimate the mass of galaxies like M31 from a. Doppler ...

Started by aabwk4

Many disk galaxies, such as Andromeda and the Milky Way, are thought to have extended halos of dark ...

Started by DyllonKazuo

Which one of the words below is a name for a type of galaxy in the Hubble classification system? ...

Started by moongchi