Understanding galaxies requires knowledge of:

Stars & their evolution, gas, dust, dark matter, black holes

After CR7 & MASOSA, the Sobral-XGAL group discovered an even UV-brighter z=7 galaxy in 2017 & named it:

VR7: the fifth super bright at z=7 and to honour Vera Rubin

Why did Astronomers at Lancaster use distances larger than the age of the Universe?

Because these are the real distances "now"

Hot Jupiters (Jupiter-size planets with orbits similar to Mercury) can be explained as:

They formed away from the Sun, but migrated in-wards

Where were all the Oxygen atoms that we breathe and drink (in water) made?

In Super Nova Type II (Deaths of massive stars)

What is wrong with this famous plot by Edwin Hubble?

There are no error bars, Wrong units on Y axis (velocities are per unit of time!), Y values "taken" from Vesto Slipher without citing him

This is a spectrum of a galaxy. It implies:

A very young age of not more than 10 Myrs.

This image was obtained by PHYS263 (2018) students in La Palma and:

reveals a stellar nursery, with green being ionised Oxygen

This spectrum of a galaxy shows strong Balmer lines. It means:

It is dominated by A stars, implying an age ~1 billion years

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Astroquiz: PHYS263 - Feedback 3

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A #PHYS263 Quiz on extra-solar planets, aliens, galaxies, near and far and other astro stuff (IMF, HR diagrams, etc)

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Questions 17

Answers

1
Understanding galaxies requires knowledge of:
Stars & their evolution, gas, dust, dark matter, black holes
Stars & their evolution, gas, dust, black holes
Spectral types of stars & dark matter only
Flat stuff, like the Earth and pluto
2
After CR7 & MASOSA, the Sobral-XGAL group discovered an even UV-brighter z=7 galaxy in 2017 & named it:
S-CR7: Sagan + CR7
LM10: as he was jealous of CR7
VR7: the fifth super bright at z=7 and to honour Vera Rubin
LP7: Lancaster-Physics-7
3
Why did Astronomers at Lancaster use distances larger than the age of the Universe?
Because these are the real distances "now"
To make it look even more impressive
Because light travelled faster in the past
David has a mistake in his plot, of course.
4
Hot Jupiters (Jupiter-size planets with orbits similar to Mercury) can be explained as:
They formed away from the Sun, but migrated in-wards
They have been inflated by being so close to the Sun
They are flat, therefore the laws of physics do not apply
They have formed in-situ
5
How many galaxies are there in the full observable Universe?
Roughly 2 trillion
Roughly 2 billion
A gazillion trillion
Roughly 2 million
6
This is:
proof that male-only science will get things super wrong
proof that aliens exist
not how galaxies rotate
how galaxies rotate
7
An Initial Mass Function described by a power-law with a single slope alpha is...
Flat (just like the Earth)
Described by A
Described by both A and B
Described by B
8
Where were all the Oxygen atoms that we breathe and drink (in water) made?
Shortly after the Big Bang
In Super Nova Type II (Deaths of massive stars)
In the Sun
On Earth
9
Who discovered the key to extra-galactic time travelling?
Theresa May
Vera Rubin
Edwin Hubble
Henrietta Leavitt
10
What is wrong with this famous plot by Edwin Hubble?
There are no error bars
Wrong units on Y axis (velocities are per unit of time!)
It's black and white
Y values "taken" from Vesto Slipher without citing him
11
The most prolific methods to detect extra-solar planets are:
Transits and gravitational lensing
Direct detection and radial velocities
Radial velocities and transits
Astrometric wobble & transits
12
The more metal rich the atmosphere of a star the more likely it is to:
Go supernova
Be at the end of the main sequence
Be a Heavy-Metal Rock Star
Host Jupiter-like planets
13
Who discovered that galaxies do not rotate like the solar system (implying dark matter)?
Henrietta Leavitt
Caroline Herschel
Vera Rubin
Jocelyn Bell Burnell
14
This is a spectrum of a galaxy. It implies:
A very old age of 13 billion years.
An intermediate age of 1 Gyr.
Aliens are trying to make contact.
A very young age of not more than 10 Myrs.
15
Detecting extra-solar planets with the astrometric wobble technique is...
fairly easy
almost impossible
like Brexit - guaranteed to work smoothly
easier than waiting for the spine to be finished
16
This image was obtained by PHYS263 (2018) students in La Palma and:
reveals that it must be fake
reveals a globular cluster, with green being scattered light
reveals a dwarf galaxy, as it contains dark matter
reveals a stellar nursery, with green being ionised Oxygen
17
This spectrum of a galaxy shows strong Balmer lines. It means:
It is dominated by Rock stars, implying an age of <30 years.
It is dominated by A stars, implying an age ~1 billion years
It is dominated by O stars, implying an age of 10 Myrs
It is dominated by G stars, implying an age of 10 Gyrs

Astroquiz: PHYS263 - Feedback 3 Flashcards | StudBud