The Sun is the central star and contains about 99.8 percent of the Solar System's mass.
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LIVE VISUAL LAB
Interactive teaching model • relationships are controlled; scale, distance or timing may be simplified and are labeled here.
The big idea
The Sun is the central star and contains about 99.8 percent of the Solar System's mass.
Its gravity dominates planetary motion, while each planet also pulls on other objects.
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HOW SCIENTISTS KNOW
Planetary orbits and solar measurements reveal the Sun's enormous mass.
WORDS TO OWN
Suncentermassgravity
!A COMMON WRONG MODEL
The Sun at the Center of Our System is only a name or picture to memorize.
✓REBUILD IT WITH EVIDENCE
Connect the sun at the center of our system to the observable relationship, evidence and system described in the lesson.
A scientifically true sentence can still create a false picture. This repair makes the relationship visible.
Take learning into real life
Try it together
Lay out a Sun card and eight planet cards in order. Add one label for rock, gas or ice and one warning that the distances are compressed. Connect what you notice to the sun at the center of our system using Sun and center.
GREEN SAFETYOrdinary low-risk activity with normal caregiver awareness.
01TALKWhat do you predict before we try it?02LOOKWhat changed? What stayed the same?03EXPLAINWhich evidence supports your idea?
Check understanding
Which statement best explains the sun at the center of our system?
Choose the explanation that matches the evidence—not just the most familiar words.
Three things to remember
✓The Sun is the central star and contains about 99.
✓Its gravity dominates planetary motion, while each planet also pulls on other objects.
✓Evidence matters: planetary orbits and solar measurements reveal the sun's enormous mass.
SPACE FIRST CLASS My journey