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Astronomy: explore STEM content (page 11 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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Flowchart13 objects

Astronomy

Astronomy · L5 · Spectral Line Formation, the Curve of Growth, and Non-LTE Effects · flowchart

@openstem

Astronomy · L5 · Spectral Line Formation, the Curve of Growth, and Non-LTE Effects · flowchart

Collection4 items

01Astronomy · L5 · Compact Object Mergers, Kilonovae, and r-Process Nucleosynthesis

02Astronomy · L5 · Compact Object Mergers: Kilonovae and r-Process Nucleosynthesis

03Astronomy · L5 · Neutron Star Merger to Kilonova and Multi-Messenger Detection

+1 more

Astronomy

Astronomy · L5 · Compact Object Mergers

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Astronomy · L5 · Compact Object Mergers

Note~161 words · 1 min

Eyes That See Farther Our eyes are amazing, but they can only collect a small amount of light. A telescope has a much bigger opening — a lens or a mirror — that gathers far more light, letting us see things that are too small, too faint, or

Astronomy

Astronomy · L1 · Telescopes

@openstem

Astronomy · L1 · Telescopes

Quiz7 questions

What observational property is used to classify young stellar objects into Class 0 through III?

AThe star's total massBThe shape of its spectral energy distribution, tracing how much light escapes at shorter wavelengthsCThe number of planets already formed around itDIts distance from Earth

Astronomy

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

@openstem

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

Flowchart9 objects

Astronomy

Astronomy · L1 · Black Holes · flowchart

@openstem

Astronomy · L1 · Black Holes · flowchart

Flowchart18 objects

Astronomy

Astronomy · L5 · Compact Object Mergers: Kilonovae and r-Process Nucleosynthesis · flowchart

@openstem

Astronomy · L5 · Compact Object Mergers: Kilonovae and r-Process Nucleosynthesis · flowchart

Flashcards7 cards

What is dark matter?1 / 7

An unseen form of matter, inferred from its gravitational effects, that neither emits nor absorbs light — it does not interact with the electromagnetic force the way ordinary matter does.

Astronomy

Astronomy · L3 · Dark Matter & Dark Energy

@openstem

Astronomy · L3 · Dark Matter & Dark Energy

Quiz4 questions

Radio telescopes face a harder resolution problem than optical telescopes mainly because:

ARadio waves travel slower than lightBRadio wavelengths are far longer than optical wavelengths, so matching optical resolution needs a far larger dishCRadio dishes cannot be made reflective enoughDThe atmosphere blocks all radio wavelengths

Astronomy

Astronomy · L4 · Radio Interferometry & the EHT — 4 Q

@openstem

Astronomy · L4 · Radio Interferometry & the EHT — 4 Q

Flowchart15 objects

Astronomy

Astronomy · L4 · Classifying a Supernova by Spectrum

@openstem

Astronomy · L4 · Classifying a Supernova by Spectrum

Flowchart7 objects

Astronomy

Astronomy · L1 · Jupiter, the Giant Planet · flowchart

@openstem

Astronomy · L1 · Jupiter, the Giant Planet · flowchart

Flashcards8 cards

What is proper motion, and what does it directly measure?1 / 8

A star's observed angular rate of motion across the sky, measured in arcseconds per year. It captures only the component of the star's true velocity that is perpendicular to the line of sight — its plane-of-sky, or 'tangential,' motion — and says nothing on its own about motion toward or away from the observer.

Astronomy

Astronomy · L4 · Stellar Kinematics: Proper Motion, Radial Velocity & Space Velocity

@openstem

Astronomy · L4 · Stellar Kinematics: Proper Motion, Radial Velocity & Space Velocity

Collection3 items

01Astronomy · L3 · The EM Spectrum in Astronomy

02Astronomy · L3 · The EM Spectrum in Astronomy

03Astronomy · L3 · The EM Spectrum in Astronomy

Astronomy

Astronomy · L3 · The EM Spectrum in Astronomy

@openstem

Astronomy · L3 · The EM Spectrum in Astronomy

Collection4 items

01Astronomy · L2 · How the Solar System Formed

02Astronomy · L2 · How the Solar System Formed

03Astronomy · L2 · The Nebular Hypothesis

+1 more

Astronomy

Astronomy · L2 · How the Solar System Formed

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Astronomy · L2 · How the Solar System Formed

Quiz3 questions

How many planets are in our solar system?

ASevenBEightCNineDTen

Astronomy

Astronomy · L1 · Planets Quiz

@openstem

Astronomy · L1 · Planets Quiz

Flashcards7 cards

What are Uranus and Neptune called as a pair?1 / 7

The ice giants — the two outermost, coldest planets in our Solar System.

Astronomy

Astronomy · L1 · Neptune and Uranus, the Ice Giants

@openstem

Astronomy · L1 · Neptune and Uranus, the Ice Giants

Flashcards8 cards

What is relativistic beaming, and what causes it?1 / 8

The concentration of radiation from a source moving at a speed close to the speed of light into a narrow cone in the direction of motion, as seen by a stationary observer. It arises from the relativistic aberration of light: in the source's own rest frame, emission may be nearly isotropic, but transforming to the observer's frame sweeps that radiation forward into a tight beam of half-angle roughly 1/Γ, where Γ is the bulk Lorentz factor of the jet.

Astronomy

Astronomy · L5 · Relativistic Jets: Doppler Beaming & Superluminal Motion

@openstem

Astronomy · L5 · Relativistic Jets: Doppler Beaming & Superluminal Motion

Flowchart19 objects

Astronomy

Astronomy · L5 · Hertzsprung–Russell Diagram: Stellar Populations

@openstem

Astronomy · L5 · Hertzsprung–Russell Diagram: Stellar Populations

Flowchart13 objects

Astronomy

Astronomy · L4 · Assessing a candidate biosignature gas

@openstem

Astronomy · L4 · Assessing a candidate biosignature gas

Flowchart17 objects

Astronomy

Astronomy · L5 · Hierarchical Structure Formation and Galaxy Assembly · flowchart

@openstem

Astronomy · L5 · Hierarchical Structure Formation and Galaxy Assembly · flowchart

Flowchart7 objects

Astronomy

Astronomy · L1 · What Makes Uranus and Neptune 'Ice Giants'

@openstem

Astronomy · L1 · What Makes Uranus and Neptune 'Ice Giants'

Collection4 items

01Astronomy · L2 · The Life Cycle of Stars

02Astronomy · L2 · The Life Cycle of Stars

03Astronomy · L2 · A Star's Life, From Birth to Death

+1 more

Astronomy

Astronomy · L2 · The Life Cycle of Stars

@openstem

Astronomy · L2 · The Life Cycle of Stars

Note~491 words · 2 min

Relativistic Beaming A source moving at a bulk Lorentz factor Γ close to the speed of light does not radiate isotropically as seen by a stationary observer, even if it does so in its own rest frame. Relativistic aberration sweeps that emiss

Astronomy

Astronomy · L5 · Relativistic Jets: Doppler Beaming and Apparent Superluminal Motion

@openstem

Astronomy · L5 · Relativistic Jets: Doppler Beaming and Apparent Superluminal Motion

Collection3 items

01Astronomy · L4 · Exoplanet Atmospheres & the Habitable Zone

02Astronomy · L4 · Exoplanet atmospheres: transmission spectroscopy and the habitable zone

03Astronomy · L4 · Exoplanet Atmospheres & the Habitable Zone — 4 Q

Astronomy

Astronomy · L4 · Exoplanet Atmospheres & the Habitable Zone

@openstem

Astronomy · L4 · Exoplanet Atmospheres & the Habitable Zone

Collection4 items

01Astronomy · L4 · Orbital Mechanics — Vis-Viva & Transfer Orbits

02Astronomy · L4 · Orbital mechanics: vis-viva, orbital energy, and Hohmann transfers

03Astronomy · L4 · Choosing an orbital-energy regime from vis-viva

+1 more

Astronomy

Astronomy · L4 · Orbital Mechanics — Vis-Viva & Transfer Orbits

@openstem

Astronomy · L4 · Orbital Mechanics — Vis-Viva & Transfer Orbits

Quiz5 questions

What does a periodic dip in a star's measured brightness usually indicate?

AThe star is about to explodeBA planet is transiting in front of the starCThe telescope has malfunctionedDThe star has stopped fusing hydrogen

Astronomy

Astronomy · L3 · Exoplanet Detection

@openstem

Astronomy · L3 · Exoplanet Detection

Flowchart13 objects

Astronomy

Astronomy · L5 · Crossing Toward a Rotating Black Hole

@openstem

Astronomy · L5 · Crossing Toward a Rotating Black Hole

Collection4 items

01Astronomy · L4 · Stellar Kinematics: Proper Motion, Radial Velocity & Space Velocity

02Astronomy · L4 · Stellar Kinematics: Proper Motion, Radial Velocity & Space Velocity

03Astronomy · L4 · Building a Star's Space Velocity

+1 more

Astronomy

Astronomy · L4 · Stellar Kinematics: Proper Motion, Radial Velocity & Space Velocity

@openstem

Astronomy · L4 · Stellar Kinematics: Proper Motion, Radial Velocity & Space Velocity

Note~197 words · 1 min

The Ringed Planet Saturn is the sixth planet from the Sun, and it is best known for the wide, bright rings that circle around it. Through a small telescope, Saturn's rings are one of the most amazing sights in the night sky. Like Jupiter, S

Astronomy

Astronomy · L1 · Saturn's Rings

@openstem

Astronomy · L1 · Saturn's Rings

Flashcards8 cards

What is the Sun?1 / 8

The Sun is a star — a giant ball of very hot, glowing gas.

Astronomy

Astronomy · L1 · The Sun, Our Star

@openstem

Astronomy · L1 · The Sun, Our Star

Plot1 plot · 1 param

Astronomy

Astronomy · L3 · Solar Insolation: y = A·|sin(x)|

@openstem

Astronomy · L3 · Solar Insolation: y = A·|sin(x)|

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