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Astronomy: explore STEM content (page 9 of 26) · openstem

All fields Software Mathematics Physics Chemistry Biology Engineering Astronomy Environmental Other Astronomy Astronomy groups

Explore STEM Content

Search the community's STEM library — free to study, yours to make your own.

Astronomy

Stars, orbits, cosmology and observation on openstem — flashcards, notes, quizzes and plots shared by the community. Study free, or clone anything into your library.

Content Groups1

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Quiz4 questions

What is light pollution?

AExcessive or poorly directed artificial light that brightens the night skyBSmoke and smog produced by streetlightsCNatural moonlight that outshines the starsDA type of radio interference affecting telescopes

Astronomy

Astronomy · L2 · Light Pollution and Dark Skies

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Astronomy · L2 · Light Pollution and Dark Skies

Flowchart8 objects

Astronomy

Astronomy · L1 · Meteor Showers · flowchart

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Astronomy · L1 · Meteor Showers · flowchart

Flowchart9 objects

Astronomy

Astronomy · L2 · Types of Galaxies

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Astronomy · L2 · Types of Galaxies

Flowchart13 objects

Astronomy

Astronomy · L4 · Active galactic nuclei: accretion disks, jets, and supermassive black holes · flowchart

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Astronomy · L4 · Active galactic nuclei: accretion disks, jets, and supermassive black holes · flowchart

Flowchart17 objects

Astronomy

Astronomy · L1 · The Eight Planets in Order

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Astronomy · L1 · The Eight Planets in Order

Flashcards8 cards

What are the three stages of impact crater formation?1 / 8

Contact and compression, excavation, and modification — the impactor first slams in and sends out shock waves, those shock waves excavate a transient crater, and the crater walls then collapse or rebound into their final shape.

Astronomy

Astronomy · L3 · Asteroid Impacts & Craters

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Astronomy · L3 · Asteroid Impacts & Craters

Flowchart7 objects

Astronomy

Astronomy · L1 · What Makes Up Saturn's Rings

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Astronomy · L1 · What Makes Up Saturn's Rings

Collection3 items

01Astronomy · L1 · Why Earth Is Special

02Astronomy · L1 · Why Earth Is Special

03Astronomy · L1 · Why Earth Is Special Quiz

Astronomy

Astronomy · L1 · Why Earth Is Special

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Astronomy · L1 · Why Earth Is Special

Collection4 items

01Astronomy · L1 · Meteor Showers

02Astronomy · L1 · Meteor Showers

03Astronomy · L1 · How a Meteor Shower Happens

+1 more

Astronomy

Astronomy · L1 · Meteor Showers

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Astronomy · L1 · Meteor Showers

Flowchart9 objects

Astronomy

Astronomy · L1 · From Meteoroid to Meteorite

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Astronomy · L1 · From Meteoroid to Meteorite

Note~320 words · 2 min

Two Bulges, Not One The Moon's gravity pulls hardest on the side of Earth closest to it, stretching the ocean there into a bulge. It might seem like that should create just one high tide a day — but there's actually a second bulge on the ex

Astronomy

Astronomy · L2 · Tides and the Moon's Pull

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Astronomy · L2 · Tides and the Moon's Pull

Collection3 items

01Astronomy · L5 · Cosmological Perturbation Theory

02Astronomy · L5 · Cosmological Perturbation Theory: From Jeans Instability to Structure Growth

03Astronomy · L5 · Cosmological Perturbation Theory

Astronomy

Astronomy · L5 · Cosmological Perturbation Theory

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Astronomy · L5 · Cosmological Perturbation Theory

Quiz4 questions

What new term appears in the expanding-universe perturbation growth equation that has no analogue in the static Jeans instability analysis?

AA pressure-support termBThe Hubble-drag term 2Hδ̇, which damps perturbation growthCA term for the cosmological constant onlyDThere is no difference between the static and expanding cases

Astronomy

Astronomy · L5 · Cosmological Perturbation Theory

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Astronomy · L5 · Cosmological Perturbation Theory

Collection3 items

01Astronomy · L2 · Exoplanets

02Astronomy · L2 · Exoplanets

03Astronomy · L2 · Exoplanets

Astronomy

Astronomy · L2 · Exoplanets

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Astronomy · L2 · Exoplanets

Quiz4 questions

Einstein's equivalence principle states that:

AMass and energy are always exactly equalBThe effects of gravity are locally indistinguishable from the effects of uniform accelerationCAll observers everywhere measure the same gravitational fieldDLight and matter always travel at the same speed

Astronomy

Astronomy · L4 · General Relativity Basics — 4 Q

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Astronomy · L4 · General Relativity Basics — 4 Q

Collection4 items

01Astronomy · L4 · Protostellar Evolution: From Collapse to the Main Sequence

02Astronomy · L4 · Protostellar Evolution: From Collapse to the Main Sequence

03Astronomy · L4 · Which Young Stellar Object Class?

+1 more

Astronomy

Astronomy · L4 · Protostellar Evolution: From Collapse to the Main Sequence

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Astronomy · L4 · Protostellar Evolution: From Collapse to the Main Sequence

Flashcards8 cards

What is the baryon asymmetry problem, and how is it quantified?1 / 8

The observable universe is made almost entirely of matter, with essentially no primordial antimatter, despite the expectation that the hot early universe produced baryons and antibaryons in equal numbers. The asymmetry is quantified by the baryon-to-photon ratio:

Astronomy

Astronomy · L5 · Baryogenesis

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Astronomy · L5 · Baryogenesis

Quiz5 questions

Astronomers must observe stars near the Galactic Center in the near-infrared, not visible light, mainly because:

AThose stars only emit infrared lightBRoughly 30 magnitudes of interstellar dust extinction make the region essentially opaque at visible wavelengthsCInfrared telescopes have better raw angular resolution than optical onesDSagittarius A* itself only glows in the infrared

Astronomy

Astronomy · L4 · The Galactic Center & Sagittarius A* — 5 Q

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Astronomy · L4 · The Galactic Center & Sagittarius A* — 5 Q

Flowchart14 objects

Astronomy

Astronomy · L3 · From Molecular Cloud to Star

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Astronomy · L3 · From Molecular Cloud to Star

Flowchart9 objects

Astronomy

Astronomy · L1 · Solar and Lunar Eclipses · flowchart

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Astronomy · L1 · Solar and Lunar Eclipses · flowchart

Flowchart11 objects

Astronomy

Astronomy · L2 · The Scale of the Universe · flowchart

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Astronomy · L2 · The Scale of the Universe · flowchart

Quiz6 questions

What is the umbra?

AThe fully dark part of a shadowBThe partially lit part of a shadowCThe bright ring around an eclipseDAnother name for the Moon

Astronomy

Astronomy · L2 · Eclipse Mechanics Quiz

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Astronomy · L2 · Eclipse Mechanics Quiz

Flashcards8 cards

What are the four cosmic 'messengers' combined in multi-messenger astronomy?1 / 8

Astronomy

Astronomy · L5 · Multi-Messenger Astronomy

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Astronomy · L5 · Multi-Messenger Astronomy

Note~195 words · 1 min

A Ninth Planet, Demoted From 1930 to 2006, Pluto was taught as the ninth planet. That changed when astronomers found more and more Pluto-sized objects out beyond Neptune, forcing them to finally define, precisely, what a 'planet' actually i

Astronomy

Astronomy · L2 · Dwarf Planets and the Kuiper Belt

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Astronomy · L2 · Dwarf Planets and the Kuiper Belt

Collection3 items

01Astronomy · L1 · The Space Station

02Astronomy · L1 · The Space Station

03Astronomy · L1 · The Space Station Quiz

Astronomy

Astronomy · L1 · The Space Station

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Astronomy · L1 · The Space Station

Note~152 words · 1 min

Earth's Long Trip Around the Sun A 'year' is not just a number on a calendar — it is the real time it takes Earth to travel one full loop around the Sun. Where the Extra Day Comes From Since Earth's real orbit is close to a quarter-day long

Astronomy

Astronomy · L1 · Why a Year Has 365 Days

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Astronomy · L1 · Why a Year Has 365 Days

Collection3 items

01Astronomy · L1 · The Sun, Our Star

02Astronomy · L1 · The Sun, Our Star

03Astronomy · L1 · The Sun, Our Star Quiz

Astronomy

Astronomy · L1 · The Sun, Our Star

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Astronomy · L1 · The Sun, Our Star

Quiz6 questions

Which planet is the largest in the Solar System?

ASaturnBJupiterCEarthDNeptune

Astronomy

Astronomy · L1 · Jupiter, the Giant Planet Quiz

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Astronomy · L1 · Jupiter, the Giant Planet Quiz

Flashcards5 cards

Where are stars born?1 / 5

Stars are born inside giant clouds of gas and dust called nebulae. Gravity pulls the gas together until it is dense and hot enough to start nuclear fusion.

Astronomy

Astronomy · L2 · The Life Cycle of Stars

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Astronomy · L2 · The Life Cycle of Stars

Collection3 items

01Astronomy · L2 · Modern Space Missions and Rovers

02Astronomy · L2 · Modern Space Missions and Rovers

03Astronomy · L2 · Modern Space Missions and Rovers

Astronomy

Astronomy · L2 · Modern Space Missions and Rovers

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Astronomy · L2 · Modern Space Missions and Rovers

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